V-2 rocket offensive began on 8 September 1944, when "Lehr- und Versuchsbatterie No. 444" () launched a single rocket guided by a radio beam directed at Paris. Wreckage of combat V-2s occasionally contained the transponder for velocity and fuel cutoff. The painting of the operational V-2s was mostly a ragged-edged pattern with several variations, but at the end of the war a plain olive green rocket also appeared. During tests, the rocket was painted in a characteristic black-and-white chessboard pattern, which aided in determining if the rocket was spinning around its longitudinal axis. The original German designation of the rocket was "V2",
Type 1945 destroyer the design was created, after the sinking of the German battleship "Tirpitz" on 12 November 1944, most of Germany's surface ships were being pulled back entirely, to serve only in the Baltic Sea. From the spring of 1945 to near the end of the war, the Kriegsmarine was almost entirely focused upon resupplying and supporting garrisons along the Baltic Coast. Later on, in May, the Kriegsmarine embarked upon the task of evacuating hundreds of thousands of civilians and soldiers from the east, ahead of the Soviet forces which were rapidly pushing westward. The Type 1945 destroyers were designed to be