First Halo Fanfic here so I hope you like it! Be sure to leave reviews as it only helps!

The year is 2543, humanity is in the middle of its 18th year of war with an alien alliance known as The Covenant. The near two decades of intergalatic fighting had caused the greatest of casualties and begun to slowly but surley push humanty towads extinction. One by one the many colonies humanity had established were taken over and glassed by The Covenant. At this rate it was only a matter of time before humanity's alien foes could potentially discover Reach or worse, Earth. The latest colony to be attacked was "Revelation" a smaller populated world compared to most of humanity's other colonies. Evacuation was going well untill The Covenant set up an Anti Air gun outside of the colony's largest city preventing any of the evacuation shuttles from launching safely. It was only a matter of time before the shuttles would be destroyed by invading Covenant ground forces, or shot down by the Anti Air gun. In a desperate move to save the colonist the UNSC sent in a squad of Spartan III soldiers known as "Fireteam Siren" to neutralize the Anti Air gun.

Most Spartan III soldiers were orphans taken by the Office of Naval Inteligence between the ages of four through seven, but Fireteam Siren was different. All six of their members were taken from their parents at the age of six and replaced with clones destined to die, similar to that of their predacesors, the widley reconized and loved Spartan II soldiers. ONI operatives saw something unique in the six children at the time and hoped they could be special. They were right, now all at age 18 Fireteam Siren became one of the most reliable Spartan teams the UNSC had to offer second only to the incredible Blue Team led by none other than Spartan 117 himself. Firetam Siren consisted of four male Spartans and two female Spartans.

First there was Chase, Spartan A-226, the squad's leader. Chase wore a MK 6 prototype helmet with two commando shoulder pads and his primary weapons consisted of the assult rile and the spartan laser. Next was Chase's best friend since day one of boot camp, Malcom A-227, who wore an EVA style helmet with Hazop shoulder pads and used a shotgun aong with a grenade launcher. Then there was Lilly A-300 who donned a scout helmet with recon shoulder pads and was the squads best shooter and sniper along with serving as a scout for joint op missions with other UNSC Personel. Lilly's partner in crime when it came to scouting was Spartan Logan A-249 who donned a recon helmet and recon shoulder pads and was a expert with the DMR rifle. Next was Sarah A-276 who used an air assault helmet and two air assault shoulder pads and primarily used a battle rifle. Last but certaintly not least was Cody A-199, the teams tech expert, who wore a MK 5 helmet with two security shoulder pads and primarily duel wielded two SMGs. All six of the spartans armor was lime green with white as as a secondary color. (Imagine Halo Reach style armor for all of them). The six warriors made their way to the Anti Air gun in hope of saving thousands of lives. Everything was quiet but the sound of nature and the squad's marching before Logan broke the silence of the group.

"So how the hell are we supposed to take this gun out?" he asked

"We shoot it" Lilly answered bluntly

"Fair point" Logan responded

"No worries guys" Malcom chimed in "I have an explosive charge that should do the trick."

"Haha always packing the big guns." Cody said with a light chuckle

Chase than spoke "Everyone stay focused, we have lots of people counting on us to take this gun out. This path were on should lead us right behind where the gun is placed."

"So we'd have the element of suprise on the Covenant forces guarding the gun?" Sarah questioned

"Exactly." Chase answered

The team continued fast marching through an old trail in the middle of the woods just outside the city. Chase took point with Lilly and Logan right behind them on his left and right flanks with Sarah and Cody in the middle and Malcolm bringing up the rear in the back. The trail kept them away from any Covenant patrols but the squad was still on high alert for any noise or movement.

"So Chase how'd you know about this trail anyway?" Cody asked

"Because...becuase I used to live right around here...before i became a Spartan"

The five other spartans were both quiet and stunned. For none of them ever had the chance to return to their homeworld, even if it was just while they were on a mission. And Chase always talked about how much he both loved and missed his family.

"Wait do you know if your family is okay?" Lilly asked in a nervous voice

"No but I lived on a farm with my parents and my llittle sister Megan just past this trail, they were good people, and I hope they made it out."

The other five could sense the sadness in Chase's voice. Chase's helmets visor also hid the few tears running down his face. It was hard for them to see their courageous leader who they all looked up to being caught in a vicious tornado of emotions. Sarah could'nt remain silent any longer.

"Chase" she said quietly "You kno-"

"Wait queit!" Logan whispered "There's the gun!"

The gun was massive in size. There were 10-15 brutes guarding the gun with squads of both grunts and jackals patrolling the area. It would only be a matter of time before the shuttles in the city waiting to be cleared for takeoff would be overrun by Covenant forces. Soon after arriving at enemy gun Fireteam Siren recieved a transmition from the unsc.

"Come in Spartans! This is Sgt. Johnson of the UNSC marines, I've got a whole lot of alien bastards on me and my position. Were trying to cover the shuttles but were being overrun! Were running low on ammo and won't be able to hold much longer, tell me your about to get that damn gun down!"

Malcolm activated his helmets communication system.

"Don't worry Sgt. where at the gun and it will be down soon. Prepare to get those civilians and your marines the hell off this planet."

Chase scanned the area and quickly came up with a plan. They were on a small hill overlooking the Anti Air gun and would have the element of suprise. He also noted this was a perfect sniper's nest for Lilly.

"Okay this is what were going to do, Lilly I want you to snipe those plasma containers which should take out several of the nearby brutes. Then Logan and I will charge the left flank while Sarah and Cody take the right flank. Malcom I want you moving up the center and take out the brute captain. Than we will deal with the gun."

The spartans nodded and got into position, they were like a pack of wolves circling a wounded buck, just waiting for the right moment to strike. Lilly than fired on the plasma containers causing an explosing killing three of the brutes in an instant, Logan and Chase than immediatly charged the left flank gunning down the Covenant forces before they even knew what was happening. Sarah and Logan did the same from the right. Malcolm in a full on sprint chaged the brute captain hitting him in the chest with his fist, shattering his armor before knocking him to the ground with a punch to the head breaking the captain's helmet in two. He than ended it all with pointing his shotgun inches from the brute's face and pulling the trigger. A squad of marines would barley be able to stand their ground against a brute captain, but Malcolm ended the fight within five seconds after the brute had even locked eyes with him. When the brutes had fallen the Spartans went to work on the jackals, when most of the jackals had fallen the few remaining grunts began to panick and run. Lilly picked them off one by one and now all that was left for the spartans was the Anti Air gun. Malcolm placed his explosive charge on the gun and roughly twenty seconds later the gun was destroyed. Chase than activated his helmet radio.

"All unsc forces this is Spartan 226, the gun is destroyed I repeat the gun is destroyed! Get those shuttles the hell out of here!"

The Spartans looked up in the sky and saw the shuttles from the city along with unsc troop transports safely escaping the planet surface. Chase just so happened to look towards his left and saw a large pillar of smoke coming from beyond the trees. In shock he droped his assault rifle to the ground and ran into the woods in the direction of the smoke with his spartan laser still attached to his back.

So what did you guys think? Whose your favorite spartan from fireteam Siren? What do you think will happen next? What do you guys wanna see in this story? Be sure to leave a review!