Tom Clancy's EndWar

Command Vehicles are unique units that give a commander access to SitRep. Only one per faction is allowed on the battlefield at any given time which means this will take a few matches to complete. Each player should deploy a Command Vehicle and then fill out their units with Gunships. When the match starts, each player sends their Gunships to the other player's deployment area and attacks the Command Vehicles. This trophy requires that you fully kill the unit, that means you need to order your units to attack again when the Command Vehicle has been downed. This is made easier by creating a squad of all your gunships, then you can order them to attack with a single voice or button command. Continue to deploy more Command Vehicles until you run out of command points or the match ends. The trophy will pop when you have fully killed 15 of these units.

If you're trying this legit, good luck. Most legit players don't use Command Vehicles because they are slow and cumbersome. If you come across one, send everything you have after it. This will definitely take a while to complete.