Section 1 – Introduction In 1939, German u-boats began attacking Allied shipping in the Battle of the Atlantic. The u-boats prowled in groups called “wolf packs.” Eventually the convoy system, as well as increased American shipbuilding 74.68 Kb. 1
Century Cold War Iron Curtain Iron Curtain: during the Cold War, the boundary separating the Communist nations of Eastern Europe from mostly democratic nations of Western Europe 14.14 Kb. 1