So, what are the limitations of such a battle? Because, with no limits and any allegiances allowed, it would be a curbs top victory for Borderlands. The various companies shown in game, the ones we see anyway, are HUGE, system - wide conglomerates. Their space travel is more sophisticated, their weapons, despite what you may think, are more advanced than the Guardians, and they have far greater numbers. And no, Guardians being immortal doesn't mean they'd win. There's only so many times you can throw yourself at a brick wall before one of you falls, and it ain't the brick wall. So it'd probably go down something like this. Let's only use the Dahl Corporation Forces vs Guardians for this example. -Dahl ships warp to Earth. -Scan planet for humanoid signs. -The Last City is discovered, and the ships move in. -Alert sounds through the Last City. -Guardians deployed. -Dahl bombards the Last City with their cannons. -Ground team deployed to mop up. -Result: Total loss of Guardian forces. Destruction and/or capture of The Last City by Dahl Corporation forces.