In the Mariana Islands... American landing on Saipan (Operation Forager) begin with a three hour air and naval bombardment (by Task Force 52). Elements of the US 5th Amphibious Corps (General H M Smith) come ashore with a force of 67,500 men, to the north and south of Afetna Point. The main American units engaged are the 2nd Marine Division (Watson) and 4th Marine Division (Schmidt). The two beachheads fail to link up immediately, but the American forces do advance inland. The Japanese garrison consists of the reinforced 43rd Infantry Division (General Saito), as well as naval contingents (Admiral Nagumo), numbering about 30,000 men.

In the Philippine Sea... Admiral Clark leads two groups of US carrier forces raiding Iwo Jima, Chichi Jima and Haha Jima. The Japanese carriers are sighted by US patrols heading through the San Bernardino Strait while some of the Japanese battleships are seen east of Mindanao.

On the Western Front... A fourth American corps is add to the US 1st Army. The US 8th Corps becomes operations on the Cotentin Peninsula. Meanwhile, elements of the US 7th Corps capture Quineville.

Over Occupied France... RAF Bomber Command attacks Boulogne with 300 Lancaster bombers, sinking 14 small warships and other vessels. 

In New Guinea... On Biak Island, the Japnese conduct an unsuccessful counterattack. On the mainland, farther east, Australian forces occupy Hansa Bay.

On the Eastern Front... The Finish 4th Corps falls back, to positions before Viipuri, under pressure from the Soviet 21st and 59th Armies (both part of the Leningrad Front).

Over Japan... The first B-29 Superfortress raid on Japan is conducted. Bombers from the US 20th Air Force in China attack Yawatta on Kyushu.