Patrol  
A unit can be told to Patrol by clicking on the unit to activate it, then selecting the Patrol option from the Action menu. When the Patrol cursor appears, hold down the left mouse button and drag a "patrol arrow" to the area you wish the unit to patrol. The unit will commence patrolling back and forth between its current location and the location you have specified. It will "wake up" and request orders if it encounters an enemy unit. You may set waypoints in a patrol by pressing the SPACE BAR while you drag the patrol arrow.