more effective later in the war. Allied bombers, which are not as cheap or effective as U-Boats, fight German interceptors, or German air factors withdrawn from the map. Excess bombers or U-boats eliminate enemy BRPs. After Strategic Warfare each power receives BRPs equal to its economic base, which may increase or decrease by a percentage of the unused BRPs at year-end (the growth rates are 60% for USA, 50% for Germany, 40% for Britain, 30% for the USSR and 20% for Italy – any extra are lost, so saving BRPs to increase the base is not sensible for Italy). Extra BRPs are received for minor countries controlled; a conquered major power (France or Italy after surrender) is treated as a minor worth half her BRP base. Germany, Britain and the USA may then spend up to 10% of their totals on strategic warfare for next year. Each major power's per-turn spending limit is half the total remaining after Strategic Warfare. Britain has a base of 125 BRPs, but as any BRP deficit from Strategic Warfare reduces the base, she often has to set aside half her BRPs to absorb U-Boat losses in mid-war. Germany begins with a base of 150 BRPs, but in mid-war will often have 300 or more BRPs including conquests, and after building all her forces may have enough of a surplus to see her base increase sharply. Countries may transfer BRPs to one another (Italy may give her spare BRPs to Germany for the high growth rate). Allied aid to the USSR, usually sorely needed, must go via Murmansk (the Germans may oppose these transfers with naval, air and U-boat battles in an off-map box), or via Persia (certain to arrive, but taking an extra turn to reach the USSR, with an initial one-off payment need to open up the pipeline). Land movement and combat Most counters in the game represent corps, or Soviet armies roughly the size of other countries' corps. In general two counters may stack in a hexagon, or five on a bridgehead (a bridgehead provides unlimited supply for the first post-combat supply phase, and supply may be traced to it in subsequent turns as if it were a port). Only armor units have a Zone of Control, which costs an extra two movement points to pass through (German and US armor have 6 movement points per turn, enabling them to move through