Tom Clancy's EndWar

This is probably the easiest multiplayer trophy in the game, if you're boosting. Match up with a partner in any Theatre of War mission type. To expedite things, your partner should deploy Gunships. Once the match starts, your partner should Evacuate all of his units. As long as less than 5 minutes have passed when you win, the trophy will pop on the results screen.

If you're trying this legit, you may get it anyway because there are a lot of boosters online who will Evacuate if they are accidentally matched with you. Your best bet is to wait until you have some upgraded units before trying this. Attempt it on a Conquest mission. If you think you can capture and hold all the Uplinks, do that, but it's more likely that your only option is to win by Annihilation. Send everything you have at the enemy's deployment zone and/or the Uplinks closest to it and hope you have the advantage.