I'm trying to get a Photon Cannon (owned by Player 7) to attack a Ghost (owned by Player 8). Both players are computers and they are on different forces and there aren't any alliance triggers. They are right next to each other, but the cannon won't attack. I tried using order to make it attack, and I tried a few AI scripts as well, but still nothing. I used AI Harass Here and tried setting Player 7's campaign level.
Anyone know how to do this?