Map overlay documenting the activities of the US Naval operations, Japanese ships, and cargo ships from August 4, 1945. The overlay contains annotations regarding Japanese submarines I-366, I-367, I-47, and I-58, destroyer Harutsuki, merchant tanker Koshin Maru, Commander of Philippine Sea Frontier, USS Earl V. Johnson (DE-702), Coastal Defense Vessel number 47, Commander-in-Chief Pacific Fleet, Commander-in-Chief Pacific Fleet Advanced Headquarters, Commander of Submarines Pacific Forces, Far East Air Force (FEAF), Task Force 37, 38, and 95, and Pearl. Significant events visible on the map include Commander-in-Chief Pacific Fleet planning for the cities of Saga, Eiyawata, Miyakonovo, Imbari, Tomtori, Iwakuni, Takayama, Urawa, Fukushima, Hachinohe, Akita, and Otaru to get leaflets then bombs, Commander-in-Chief Pacific Fleet Advanced Headquarters being escorted, Commander of Philippine Sea Frontier attacking USS Earl V. Johnson, Task Force 38 shipping sweep, I-366 and I-158 patrolling north of Palau, I-367 and I-147 patrolling between Marianas and Okinawa, Koshin Maru sinking by mine, Task Force 38 and 37 withdrawing to avoid storm and refueling, and Task Force 95 sweeping China coast.