Ok, for those of you who dont know 40k, look up space marines on wikipedia. Basically, They’re geneticaly modified 3m tall killing machines, created to fight the hardest of humanities battles in a galaxy that has been at war for 1000 years. Space marines carry a bolter, a huge, 1.25 cal machine gun that fires exploding rounds, capable of blowing apart an unarmoured human. They may also be armed with a chainsword, which is basically a chainsaw sword (gears of war ripped the idea off)
Try putting space marines into a few situations...
Darth maul is replaced by a Veteran Sargeant, armed with a power sword (sword covered with an energy field)
The gungan guys get a squad of marines in the battle for naboo, but the droids aren’t shut down.
The stormtroopers get 10 marines wen fighting the ewoks.
The Jedi get 5 marines when defedin their temple.