Map overlay documenting the activities of the US Naval operations, Japanese ships, cargo ships, and weather patterns from April 3, 1944. The overlay contains annotations regarding US Task Force 50, German Submarine UIT-25, Japanese Cruiser Kitagami and Noshiro, Destroyer Shikinami, Aircraft Carrier Chiyoda, Zuiho, and Ryuho, Submarines I-174, RO-114, RO-111, RO-104, RO-113, and I-180, Battleship Musashi, Tankers Nissin Maru, Ogura Maru, and Sanko Maru, Cargo Ships Nittetsu Maru and Shonan Maru, ships Bushin Maru, Shuei Maru, Manko Maru, Shoryo Maru, Houitsu Maru, and Taiyoko Maru, and Cruiser Divisions 7 and 16.

Text describes action on various war fronts: New Guinea -- China -- Philippines -- Siberia --Mediterranean -- Western Europe -- Russia. Large world map is keyed to text and illustrates time zones around the world. Includes inset maps: Action in New Guinea -- Drive to the Caucasas -- Vital distances in Europe, Africa, and Western Asia. Photographs: Combat photo taken through a submarine's periscope of a sinking Japanese destroyer -- U.S. aid to Russia -- Tommy goes over [method of crossing a river] -- Jap 'Belly tank' -- Stingers on the Flying Fortress.