german a-Series Rockets were initially developed as a retaliatory weapon to cause fear and disruption deep in Allied territory. These advanced versions have been designed to turn the tide of battle for an advancing Nazi army.
A-Series Rockets are used preemptively in German attacks. They move (are fired) during movement, and the effects of these attacks are resolved before units are moved to the battle board during the combat resolution phase. To purchase and build these rockets, the German player must have built the previous iteration at least one turn prior. For example, to build the A-12, the Germans must have already built at least one A-11 on a previous turn, one A-10 before that, and so on. If using the V-1 rules, V-2s and A-4s are considered beginning technology and do not require V-1s to be built the prior turn. V-1, V-2 and A-4 are all available during the initial buy purchase and on Turn 1. Rockets are placed in the air support box during the Place Reinforcements phase and can be stockpiled and used as the player wishes.
-description from publisher