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 maintained their numerical superiority and had 23 dreadnoughts ready and four battlecruisers still able to fight, while the Germans had only 10 dreadnoughts. One month after the battle, the Grand Fleet was stronger than it had been before sailing to Jutland. "Warspite" was dry docked at Rosyth, returning to the fleet on 22 July, while "Malaya" was repaired in the floating dock at Invergordon, returning to duty on 11 July. "Barham" was docked for a month at Devonport before undergoing speed trials and returning to Scapa on 8 July. "Princess Royal" stayed initially at Rosyth but transferred to dry dock