The initial strategic decision which dictated our course in this war was adopted by the secret conference at Washington in March 1941 between the British and American Joint Chiefs of Staff.
Morison, Samuel E.
"Thoughts on Naval Strategy, World War II,"
Naval War College Review: Vol. 21
, Article 3.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol21/iss3/3