A long time ago in a galaxy far, far away...
Marines traveled on a ship called Sulaco and deployed using the Rasputin and the Vindicator.
Aliens needed a mysterious substance known only as "royal jelly" to evolve beyond T1.
And one time a dipshit marine named James Wanderer threw a grenade inside of the Vindicator, crippling the entirety of Alpha squad before they had even landed.