Each mission begins with a certain number of reinforcement points with which you can call in more units; the immersion level is maintained by having a transport aircraft fly low to drop them off by parachute. Exactly which units are available to you varies in each mission, with some focusing on infantry roles and others on tanks, while an all-helicopter level is also present. Once your units have been reduced to tiny little pieces, their equivalent points slowly trickle back to the sum available to you, meaning that you'll never find yourself completely out of units.
Of course, one of WIC's highlights is the ability to call in back-up in the form of Tactical Aid. Gained by capturing territory and sending enemies to a happier place, this is another encouragement to keep you pressing onward. Besides the much-touted nuke, there's an impressive selection of carnage and destruction on offer, ready for you to order and take away, like some sort of military Walmart. Radar sweeps, napalm strikes, laser-guided precision bombs, air-to-air strikes, carpet bombing and heavy artillery are just some of the helpful bonuses on offer.