Western Allied invasion of Germany and Operation Undertone, occurred during which event?
Operation Undertone Operation Undertone was a large assault by the U.S. Seventh and French 1st Armies of the U.S. Sixth Army Group as part of the Allied invasion of Germany in March 1945 during World War II.
Altmark Incident The "Altmark" Incident (Norwegian: "Altmark"-affæren; German: "Altmark-Zwischenfall") was a naval incident of World War II between British destroyers and the German tanker "Altmark", which happened on 16-17 February 1940. It took place in what were, at that time, neutral Norwegian waters. On board the "Altmark" there were some 300 allied prisoners (officially internees), whose ships were sunk by the pocket battleship "Graf Spee" in the Southern Atlantic Ocean. British naval forces cornered the tanker and later the destroyer "Cossack" attacked the German ship and freed all the prisoners, killing and injuring eight German seamen with firearms and wounding ten others, five of them seriously. A British and a Norwegian sailor was also seriously wounded in the action. Germany claimed that the attack was a grave violation of international law and of Norwegian neutrality.