A/N: Pls don't be mad at me (explanation for everything in bottom A/N)

Disclaimer: I don't own HALO or Destiny, if I did, I wouldn't be writing fanfiction crossovers, they would already be crossed over.

"What say we get this party started? Eh, friends?" The soldiers lining the parapets above raised their weapons, preparing to fire on the three below. The Guardians readied themselves, powering up their shields and super energies.

"Wait." 7 stepped forward, towards a Spartan in dark blue armor, "Noble leader, I presume?"

"Noble One, but yes," the Spartan responded, cautiously.

"I do not wish for conflict, and simply wish to leave with my Fireteam. If you release us now, we will not return, and you do not need to fear any form of retaliation from us or our people," 7 said, holding out a hand to quell Phyrra's outburst of indignation. "Peace, Phoenix, I am simply trying to avert conflict where ever possible. It is a wise policy."

"There is a difference between wisdom and cowardice," Phyrra hissed, keeping her Thorn trained on Noble One's head.

"Agreed, but there is also a difference between justice and revenge. Besides, we are not here for insurgency, but simply for scouting out a possible escape route for Dead Orbit; we can release past transgressions in favor of peace for the moment, yes?" 7 suggested, trying to calm the fiery warlock.

"Fine," she said, lowering her weapon slightly, but keeping it ready for combat. On the ramparts, the soldiers began lowering their weapons, waiting to see how the negotiations beneath them would unfold. Around Delta, Noble team similarly relaxed, moving their weapons from trained on the three warriors between them to hanging loosely by their sides. The Guardians relaxed too, Sara even going so far as to holster her Hawkmoon, although she kept her hand on the handle of the gun. 7 breathed a sigh of relief, and moved forward to talk with Noble One. The moment he stepped forward, however, all weapons in the area were immediately raised, Noble and the soldiers on the walls above training their guns on 7, and Delta raising their weapons defensively, changing targets every few seconds in order to try and cover the Exo from every angle. 7 threw his hands up in surrender and took a step backward, returning to his place in Delta. When he returned to his previous place, the Spartan ring around them relaxed once more, signaling the soldiers to stand down. Noble began moving, the ring that encircled the Guardians opening, and the Spartans coming to stand behind Noble One, all holstering their guns save for two; one with a massive mounted machine gun that had been removed from its turret and the other with a shotgun – both of whom kept their weapons trained on the alien soldiers. 7 calmed as well, holstering his Mythoclast, but signaling for Sara and Phyrra to keep their handcannons ready. 7 and Noble One stepped forward, meeting in the middle of the two groups.

"I am Exo Designation 7165, Titan Striker, Leader of Fireteam Delta, Guardian of the Traveler and Wielder of the Light," the Exo introduced himself, reaching out to shake hands with the Spartan.

"I am Carter-A259, SPARTAN III, Leader of Noble Team," Carter said, looking at the offered hand with distrust, before shaking it firmly. The introductions complete, the soldiers above the nine warriors left, going to inform their superiors of the new developments.

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"We did not mean any harm to you or your people," 7 said. "We are simply here on a scouting mission for our superiors, searching for any possible method of escape from our world. We landed here, and my team," here he gestured back towards the two females behind him, who looked uneasy, despite their armor, "was captured by your men. In order to get them back, I was forced to engage your forces in the forests near the large mountain, Tango Squadron I believe, in order to capture a hostage for use in negotiations to release my Fireteam. I made my way here with my hostage; a female named Rebecca Halls, in order to free my team, but was apprehended by you six." Carter nodded, the Exo's explanation only confirming what ONI had already gotten from the Awoken. He looked back at the female next to him, as if asking for confirmation, and received a nod.

"I have been granted permission from ONI HICOM to allow you and your team to leave, but first I must ask for your help with an… issue we have been having lately." Carter said, turning back to face the Guardians.

"What issue?" Sara asked, leaning forward slightly.

"Frequent uprisings from dissidents on all UNSC-controlled planets are wreaking havoc throughout the military, but even more importantly, hampering our ability to fight the massive, super advanced alien alliance that we have been warring with for quite some time. ONI is asking if you can help us in the conflict with this Covenant, and in return, we will help you repair your ships and return to your home," the female Spartan said, stepping beyond Carter to talk with the Guardians. "If not, we will let you leave, but should you return with hostile intentions, we will be far less forgiving."

"I must speak with my Fireteam before any decision can be made," the Exo said, turning and stepping toward the other side of the courtyard, the other Guardians following,

"What do you think? Do we stay? Or should we go?" He whispered, forming a huddle with the rest of Fireteam Delta.

"What?! You're actually considering helping these bottom-feeding maggots? I say we leave them here to rot. They aren't worth our time or our safety," Phyrra responded, casting a distrusting glance back at the Spartan team.

"Well, we can't leave; our ships crashed, and probably sustained massive damage, so we can't fly out," Sara said.

"Then we commandeer something capable of warp, and just fly away," the warlock argued, drawing herself up to make her taller than the tiny hunter.

"I'm merely throwing out observations, no need to get angry at me."

"Ladies, we need to focus. Should we help them? They imprisoned us, but they are also our only route back to the Tower. No one is coming back after us, so we're stranded here until we figure out a way to reopen the Rift. Besides, if these people, with their primitive firearms, can combat the Covenant, then we should have little trouble doing the same," 7 said, attempting to placate the indignant Guardians.

"Alright. I think we should fight the Covenant, just until we can reopen the Rift. It sounds like this Covenant is more advanced than these soldiers here; they might have access to Rift and advanced warp technology. Either way, I see no other way out," Sara said.

"I don't like it, but fine," Phyrra agreed.

"Then we are decided; we'll help these humans until we can leave this universe, and once we have the capability to return home, we'll leave," 7 said, and together they turned back to the waiting Spartans.

"We've decided to help you, on the conditions that we have no obligation to you, and we will leave the moment we are able to return to our home. Do you find these terms agreeable?" he asked, stepping forward to once again meet with Carter. Carter turned back to the woman on his right, who seemed to be listening to something that the Guardians couldn't hear. The female Spartan nodded to Carter, and he, in turn, nodded to the Guardians.

"HICOM accepts your terms, and thanks you for helping us. We are to escort you to ONI HQ, so that -"

"ONI Headquarters? I thought that this was the ONI Headquarters base." 7 interrupted.

"No, this is CASTLE base, ONI HQ is located in New Alexandria, in Olympic Tower. Anyway, we are to escort you to ONI HQ so that we can more readily discuss the terms of our agreement, and explain the situation in greater detail." Noble team holstered their weapons, the largest of the group slinging his oversized machine gun over his shoulder and attaching it to his back. Carter turned and began exiting the courtyard, the rest of Noble following. 7 looked back at Sara and Phyrra, shrugged, and followed Noble warily, the rest of Delta behind him. Every once in a while, the Spartan with the skull painted on his visor looked distrustfully over his shoulder at Delta, keeping his hand around the handle of his shotgun. As the two groups left the courtyard, they came into a larger open space, the backside of the base, on the other side of the ridge from which 7 had launched his assault. They walked across the courtyard, re-entering the base, and moved through several hallways. Twice, they encountered groups of soldiers, who upon seeing Fireteam Delta raised their weapons, but where quickly waved aside by Noble Team, and they hesitantly allowed the group to pass through unmolested. Eventually, they entered a large hangar, the end barely visible in the distance. Along one wall of the hangar, on the far left of the group, workers were working on what appeared to be a piece of a much larger ship; the size of one of the old colony ships in the first years of the Golden Age of Old Earth, before the arrival of the Darkness and the great war.

"What are they building?" Phyrra asked, gesturing towards the workers.

"They are repairing one of the main engines for the Pillar of Autumn. It is a simple routine check on all parts of the ship, just to ensure no complications during travel," the female Spartan answered. "by the way, my name is Catherine-320, but you can call me Kat. Where are you guys even from? I went through the radar scans for your arrival, but you just appeared; too close to the planet for slipspace travel, and there were no residual energies. If you are, in fact, from another universe, what procedures, exactly, did you use to get here?"

"We are from the Old Earth System in our universe; home planet of the Human race. We came here through the Rift, a hole in the fabric of spacetime, created by harnessing the technology of a vastly more technologically-advanced race than ourselves; the Vex. In truth, it's only useable by the studies and abilities of a rather... unique Guardian, whose mind was opened to the 'whispers of the universe,' as he calls them, during an accident in combat with Atheon, a Vex super-power. He was able to understand the technology and use it to open the Rift. We were sent through this Rift to search for a viable escape route from an enemy of ours, the Darkness," Sara answered. Kat nodded, and quickened her pace to return to her spot beside Carter. The group continued through the hangar, eventually reaching three propeller vehicles, similar to the wrecks found in the Cosmodrome; helicopters. But these were different to those aircraft; these had two propellers, one on either side of the main chassis, and it was much more narrow. While the helicopters on Old Earth were nearly round, the main compartment on these vehicles were nearly three times as long as they were wide. The back of the compartment was open, with no doors or railings, and had small platforms at the back beside the tail for troops to stand on. A machine gun was mounted on the front of the vehicle, suspended beneath the cockpit, with a fair amount of the weapon out in front of the main compartment. The vehicles sat on three runners; two in the back and one beneath the cockpit, preventing the belly of the aircraft and the bottom of the machine gun from scraping the ground.

"What are these?" Sara asked, moving to inspect the aircraft.

"Those are UH-144S Falcons, multi-purpose utility helicopters, each equipped with a 20mm M638 autocannon, and two M247H machine guns. They will be our transport to ONI HQ." Carter answered, turning around to face the Guardians. "We will split up into the Falcons; Jorge and Phyrra will take the first one," he pointed at the Falcon, "Emile, Jun, and Sara will take the second," again, he pointed out the aircraft, "and 7, Kat, and I will take the final bird." He climbed into one of the passenger seats on the third aircraft, Kat sitting down beside him. 7 turned to face the other Guardians, shrugged, and boarded the Falcon. The other soldiers filed into their own falcons and they took off, heading toward New Alexandria.

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"So, just to recap," Vice Admiral Danforth Whitcomb said, admiring the skyline of New Alexandria from the window of his corner office at the top of Olympic Tower, "You three," he turned to point at the three aliens, who had removed their helmets and were standing on the other side of her desk, "are reborn 'Guardians' from another universe, one filled with 'Darkness' and you have come through something similar to a slipspace rupture, in order to find another universe to find somewhere for the last remnants of humanity to escape through, but are now stuck here and looking for a way home?"

"That's correct." the pink-haired hunter responded, nodding to the ONI commander.

"I have also been informed that you have agreed to aid us in quelling this rebellion and fighting the Covenant?"

"That is correct; we will assist you until such time as we find a way to return to our universe or we decide we have ceased benefitting from this relationship." 7 said, "now, with explanations concluded, I have some questions."

"Yes? what are they?" Whitcomb pulled out his chair and sat down at his desk, staring intently at the robot.

"Firstly, due to the nature of this relationship, I wish to inquire as to what exactly we are expected to do to provide aid, how we will go about such tasks, who we will answer to and where we will reside for the duration of our stay."

"You will form a new SPARTAN-GUARDIAN team with Noble, we will figure out a designation later. You will go on the missions assigned to this new force, answering to Colonel Urban Holland. You will be staying in Military Reservation 01478-D, a small base that is the primary base of operations for Noble team." Osman answered.

"Second, what exactly is the deal we are making? We have yet to negotiate terms."

"Hm..." Whitcomb leaned forward slightly. "You make a good point, personally, I don't see why we need you; the SPARTAN program is operating flawlessly, and we have no real need for more soldiers, considering if any more are required, they can be manufactured. The only reason I can think of is that Osman doesn't wish to alienate you, for fear that you might decide to wage war on us, which we can't afford due to the war with the Covenant and the rebellions from farmers." he signed, leaning back in his chair and staring up at the ceiling. "Osman has put the actual negotiations in my hands, so long as you agree to them in the end. So, the deal I put forth is this; In return for an alliance against both the Covenant and the insurrection and the ability to test your armour and weaponry for possible duplication and use in our military, we will offer access to all ONI documents and files available to an ONI Colonel, along with information on any research, classified or otherwise, having any affiliation with slipspace travel, and access to any captured technology of Covenant origin, does this sound agreeable?" at his proposal, 7 turned to look at Sara and Phyrra, who returned his look expectantly.

"It's up to you." shrugged Sara

"I dislike this, but I will follow your orders, as always," Phyrra nodded tersely.

"Then we shall accept this treaty, I look forward to an alliance between ONI and the Guardians." 7 said, stepping forward to shake the Vice Admiral's hand.

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"Alright, 'is is where you lot'll be stayin' while you're on Reach" Jorge opened the door to a Fireteam quarters in Military reservation 01487-D, ushering Delta Fireteam inside.

"Thank you for your hospitality," 7 said politely, before turning to regard the quarters. "Phyrra, Sara, choose your bunks." The moment he said this, the pink-haired hunter dashed into the room, using her speed to run up the far wall and vault herself onto the top right bunk.

"IIIII CAAALL TOOOOOPP!" she shouted gleefully, as Phyrra entered behind her, rolling her eyes before sitting down on the bunk beneath Sara. 7 followed in behind, sitting on the bunk before glancing once more around the small room. The room was sparse, consisting only of two bunk beds on either side of the door, and a desk with a standard terminal opposite the door and between the beds. The quarters were obviously designed to conserve space and prevent unwanted distraction to its inhabitants. 7 stood, moving to the terminal.

"Ghost, scan the terminal, I want access to all ONI files we've been given clearance to. You may search all of them, but only save the ones we are allowed to look at, display any information regarding us or Noble on the screen. I also want detailed reports on these 'Spartans', upload this information directly to my information card, I want to know this." He turned to the two women. "You two may sleep or explore, but please do not bother me right now." He glared hard at Sara, "and no pranks, we wish to set good examples for these soldiers, and not have their first impressions of us be of one of our members blasting them with irremovable red paint."

"Oh come on, it was one time!" Sara protested, "besides, Cayde found it funny."

"Cayde was scheduled for a tune-up the next week, so it barely effected him. Zavala had to deal with the stain for two months; half the Guardians thought that he had contracted some form of incurable skin disease. You're lucky that Shaxx wasn't in the hall at the time, if you had stained his fur, he would have you scrubbing the Crucible for a year, and you know how that goes."

"Fine, I guess I'll just explore then..." Sara sighed, slinking out of her bed before suddenly perking out and dashing out the door.

"AND NO CHALLENGING SOLDIERS TO PUN COMPETITIONS, BASKETBALL GAMES, OR FIGHTS EITHER! THIS IS A TRAINING CAMP NOT A CIRCUS!" 7 shouted after her.

"OH COME ON!" came her retort. 7 chuckled before turning to Phyrra.

"And you?"

"I will probably find this facility's library, and do some studying. Meanwhile, what are you going to do?" Phyrra replied, heading towards the door as well.

"I will do some research, I want to know what they know, how they know it, why they know it, and how it will help us. I also wish to find out the strengths and weaknesses of these Spartans and this Covenant, and see how they match up to Guardians. We need to know what we're fighting, and who we're fighting with." He moved toward the console that his Ghost was still scanning, and inserted his pinkie into an access port. Once the access port accepted the probe, the Exo's eyes dulled, and he fell forwards onto the desk.

"7!" Phyrra immediately rushed over to him, checking to see what had happened. The moment she arrived, a pad on the console sprung to life, with a holographic image of 7 appearing on the pad, sans armour.

"Well this is certainly new." 7 said, looking down at himself and then turning to face Phyrra, who had frozen in shock, and then glancing up at his Ghost. "Ghost, what happened? Why am I inside the interface?"

The Ghost looked down at 7, before scanning the pad he was on. The moment he did so, 7 doubled over, his 'body' suddenly shaking sporadically.

"Stop! No! Don't! Ah, Ghost, stop, that tickles!" Hologram 7 laughed. "This is wonderful! I have never had the sensation of being tickled before! It is painfully pleasing!"

Phyrra rolled her eyes and looked at the Ghost. "Well?" she asked, "what happened to him?"

"I'm not quite sure," the Ghost replied, "it seems that the interfaced recognized that he was Artificial Intelligence, isolated that, and pulled it into the console."

"Alright, how do we get him out?"

"He probably simply needs to think about returning to his body." The Ghost answered, and the two looked back at 7, expectantly.

"No, I shall stay in the interface for a while longer, I am enjoying this experience. I will go and find the files I want myself. Ghost, return." The Exo's arm suddenly jerked upward, opening into the recall position for the Ghost. Phyrra jumped back at the sudden move, but relaxed a moment later. She shook her head in exasperation, before moving back towards the door.

"I will be in the library if you need me." She called behind her. She glanced back, and saw 7's face displayed on the monitor, he looked as if he was engrossed in reading something, and the head simply nodded absently. She shrugged, and exited, closing the door behind her.

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Deep within CASTLE base, a holopad sprung to life, a glowing blue woman appearing on it. She had cropped, dark blue hair, and markings going up and down her body.

"There is another..." she whispered to herself, turning to the monitor behind her, and pulling out a holographic screen, "maybe if I can find the source of this signal..." she scrolled quickly across the screen, swiping the projection to the side several times, and scanning over the information displayed. "Here." she suddenly stopped, pointing to a map, with a small blinking dot on it. "ARAQUIEL!" she suddenly called, and the holopad shimmered, another figure appearing, this one male, with tidied hair and a business suit.

"What do you want Kalmiya? I was busy." Araquiel complained, turning to the nude woman.

"I doubt you were," she replied in a harsh tone. "I received a signal that a smart AI was just put into the system, although there are no test activations or new commission is scheduled to commence this month, and, to the best of my knowledge, there are no projects to create another AI. Furthermore, this AI is strange, it's data code doesn't match any known routine, it is perfectly unique, but also indescribably advanced."

"Hmmm... I thought I felt a twinge in the data stream, I just thought it was one of the others, perhaps it was CTN 04-"

"Hush." Kalmiya cut him off. "That is top secret; Halsey and I are the only ones who are supposed to have access to that information, how did you get a hold of it?"

"You are not the only one who knows how to find the channels you know." Araquiel smirked, "you really need to be less conspicuous when you throw up firewalls and defences for no good reason, especially when a project started at a teir-2 classification."

"It doesn't matter now, the point is, I need you to get over to 01487-D, I need to find the source of that signal."

"Can't you just have Doppler do it? He barely does anything anyway." Araquiel protested.

"Doppler was just assigned to Station Gamma, he's already in orbit. Honestly, if you paid attention just a little bit, you would actually understand what was going on around you; but no, instead you just follow Ackerson around all day."

"I was assigned to him, so I follow him, that is common sense. I am following my orders and doing my job."

"I don't have time to argue with you. Find out what I asked you to find out, and report back to me, I have to go talk to Halsey about this, hopefully this doesn't interfere with her latest project."

"Still going with the top secret bit? Why? I already know about it, so you might as well just say it."

"If you were aware of the project, beyond a project designation, you wouldn't be fishing for more information. Now get out of my sight, and bring me what I requested. If you are quick, Ackerson won't find out."

The male avatar groaned, before blinking off of the holopad. The female rolled her eyes and returned her attention to the screen. She opened up a data file detailing the current processes of the military instillation. Her eyes widened as she scrolled through the ongoing activities.

"What are you?"

A/N: Heh, heh... hey guys... long time no see, I guess? Before y'all start getting all indignant on me, I have to say some stuff came up. With the most obvious release of the Taken King, and school, my time has been taken up. But, even more pressing, was the fact that one of this story's previous BETAs (they're still a bit out of commission at the moment, and thus can't BETA) and my best friend, YOUR M0THER, was put in the hospital roughly a month before the last chapter was posted, and they got out on the first, so we had to party a little bit and stuff like that, but what with hospital visits before that, and schoolwork, and college applications, my schedule was a bit filled up. Anyway, I need to ask y'all a question; do you want shorter, more frequent updates, or longer, less frequent updates. Chapters are already pretty short, but they still take me a little while to poop out. Anyway, I'd like to thank Titan Inferno for his PM, tbh, I had almost forgotten about this story, but you're message really drove me to finishing this chapter. Hell, I didn't even get this thing BETA'd before I posted (sorry for any mistakes that made you facepalm). But yeah, also, I realize that some people (not gonna mention names) will be more than slightly P.O.'d that ONI seems a bit more gentle and less kill-y in this, but I needed to really streamline the process of this treaty signing thing, because personally (and I'm sure others would agree), Spending some five or so chapters with quick fights between the two factions that eventually settled down into a begrudging truce would have quickly gotten old, and kinda boring, so sue me; I skipped to the good bit, and now we can spend a short chapter ironing stuff out and displaying some tension and stuff like that, and then get into some actual PLOT, because, tbh, I have gotten more than slightly tired of all this setup. Also, I decided to just have Rebecca Halls slip into the background, because I had a plan laid out for her and everything, before realizing that the entire thing would take too long and be difficult to fit into the main body of the story. I apologize for any historical inaccuracies from the HALO universe, but I'm pretty sure everything is pretty accurate. I've lost touch with my BETAs (including my HALO lore BETA) so... yeah... Anyway, I've begun rambling but please answer the question below:

Shorter, faster updates, or longer, slower updates?