Battle of the Atlantic Battle of the Atlantic The Battle of the Atlantic was the longest continuous military campaign in World War II, running from 1939 to the defeat of Germany in 1945, and was a major part of the Naval history of World War II. At its core was the Allied naval blockade of Germany, announced the day after the declaration of war, and Germany's subsequent counter-blockade. It was at its height from mid-1940 through to the end of 1943. The Battle of the Atlantic pitted U-boats and other warships of the "Kriegsmarine" (Navy) and aircraft of the "Luftwaffe" (Air Force) against the
Battle of Jutland the Outer Jade Roads until 01:00 on 31 May, heading west of Heligoland Island following a cleared channel through the minefields, heading north at . The main German fleet of sixteen dreadnought battleships of 1st and 3rd Battle Squadrons left the Jade at 02:30, being joined off Heligoland at 04:00 by the six pre-dreadnoughts of the 2nd Battle Squadron coming from the Elbe River. Beatty's faster force of six ships of the 1st and 2nd Battlecruiser Squadrons plus the 5th Battle Squadron of four fast battleships left the Firth of Forth on the next day; Jellicoe intended to rendezvous with