Please add the effect in triggers by which a group can be spawned in or revealed and rendered visually. Trying to create a complex or large multi-piece battle ultimately hits a wall with FPS becoming single digits. If the player can create triggers to spawn in units after say, a condition for time or group X enters radius C, then these larger battles would be possible. I have been wanting this feature for a long time and don't know why its not in the game when it appears to be standard with older games.