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1940
August
14
The Tizard Mission
On 14 August 1940 Henry Tizard flew across the ocean. His mission gave neutral America British secrets, including the cavity magnetron behind new radars.
1941
June
21
The creation of the Office of Scientific Research and Development
In late June 1941 Roosevelt created Vannevar Bush’s OSRD, which took over US military research, from radar to uranium. The Manhattan Project began in 1942.
1942
October
11
The Battle of Cape Esperance
On the night of 11–12 October 1942 Rear Admiral Scott's cruisers surprised off Guadalcanal a Japanese force sent to shell Henderson Field.
November
30
The Battle of Tassafaronga
During the night of 30 November–1 December 1942 Tanaka's Japanese destroyers torpedoed and sank the cruiser Northampton and badly damaged three others.
1943
June
20
Operation Bellicose
On the night of 20–21 June 1943 RAF Lancasters bombed the Zeppelin works at Friedrichshafen and flew on to Algeria, also hitting planned V-2 production.
July
06
The Battle of Kula Gulf
On the night of 5–6 July 1943 Japanese destroyers torpedoed USS Helena in Kula Gulf. Japan lost two ships but landed its reinforcements.
August
06
The Battle of Vella Gulf
On the night of 6/7 August 1943 six US destroyers ambushed four Japanese destroyers off Kolombangara and sank three of them without suffering a single hit.