I've added an "attack move" button. The normal move command orders a soldier to move to a location, even if he sees an enemy on the way there. The attack move command orders a soldier to stop if he sees an enemy. If the enemy is killed the soldier will move on to his destination.
I've also added a "hold fire" button. Enabling it will keep soldiers from shooting at enemies, but they will still aim their weapons and track the enemy units. This is ideal for ambushes and sneaking up on the bad guys.
