Volume 12 covers all naval engagements during the first three months of 1944. In the Pacific, US Operation Cartwheel successfully isolates the strong Japanese force at Rabaul. US and Australian forces advance along the New Guinea coast toward the Philippines. The US Navy wages the air attack on Truk, then captures the Gilbert and Marshall Islands. Meanwhile in Europe, the Allies invade Italy at Anzio and prepare for their landing at Normandy, France.