The team bursts through the last small bushes into the open area designated 'Evac Alpha'. There is a pelican dropship on the ground with its rear door open and waiting, several marienes already running in towards it, the team also notices two people in special black suits and armour guarding the flanks of the ramp "ODST" thinks Jackson instantly, the Human races elite drop troops chosen from the best in the military. The flairs make a large ring around the clearing as the helicopter circles around, showing off it's agility to ensure at least 1 gun is always pointing out to ward off threats.
However all these things are simply taken in at a glance, what the entire team stares at is the huge armoured human standing out in the open, right in the centre of the clearing. The instant they move into the open he has a gun trained on them and each of them gets the feeling that they are very glad they are alies not enemies. The watch him snap his attention away from them and onto three grunts that come out of the side of the clearing, they barely have time to register them before the armoured man has already dropped then with headshots from his DMR.
As they get close a marine sprints up to them "You the cadets? Get out of the hog and into the pelican now! Liftoff in 1!"
The team obey and all sprint for the pelican, running close to the armoured... Man? They realize he is over 8 feet tall. Once inside they are directed to their seats and told to strap in "Prepare for liftoff, we blast right to orbit then we are bugging out of the system, blind jump as per proticol." They are told by a man dressed in Admin staff clothing, it's strange though, he seems calmer and more collected than the marines.
The armoured man runs abourd and simply grabs a roof rail, forgoing a seat as the pelican begins to lift off before the door is even closed.
"What about the others?" Jackson shouts over the noise of the engines.
"You are the last" The armoured man replies while looking out the door
"We are the last survivors from the base?" Jackson replies shocked
"From the Planet." Is the reply. The man points out the door and the team sees the city in the distance, multiple ships flying over it with giant beams blasting down and turning it rapidly Into a barren flat wasteland. The door shuts, blocking the horrific view.
As they think on the sheer level of destruction they hear the Admin guy click open a communicator and speak quietly into it "This is Oni 3714, mission complete, no traces left." He then clicks it shut and closes his eyes before speaking quietly to the team "To put it simply, the self destruct looked normal to you and you never saw me on this planet." He then stays silent, the team knowing better than to reply or argue with an Oni agent. They simply stare at the back of the Spartan.