Japanese air attacks on the Mariana Islands and anti-aircraft guns shot down about 37 Japanese aircraft during these raids. After the Marianas began to come under attack, the United States military stepped up its raids on the Japanese-held islands which could be used to launch raids on the B-29 bases. Particular attention was given to Iwo Jima, as it was correctly assumed that the Japanese aircraft which attacked the Marianas were flying from Japan and staging through the island en route to their targets. Following the first raid against Saipan in November, XXI Bomber Command B-29s were dispatched against Iwo Jima's airfields on November 5 and 8.
Action of 23 April 1945 struck the U-boat which had a Japanese flag painted on the side. The German submarine sank quickly at position with 54 men still aboard, including "Kapitänleutnant" (Lieutenant Commander) Fritz Schneewind. Afterward, the Americans surfaced and rescued one wounded German warrant officer and took him prisoner. Action of 23 April 1945 The Action of 23 April 1945 was a submarine engagement of World War II that occurred in the Java Sea between Nazi Germany and the United States. It resulted in the last sinking of a German U-boat in Asian waters during the Pacific War and was one of only a