ibiblio
Ibiblio: The Silent War Against the Japanese Navy
Extensive article which chronicles the efforts of U.S. Naval intelligence to read the secret radio messages of the Japanese Navy.
The History Place
The History Place: World War Ii in Europe Timeline
This site from The History Place provides this extensive timeline of the events of WWII from the end of WWI until the conclusion of the War. Links to major events include photos along with additional information throughout.
Ibis Communications
Eye Witness to History: Loose Lips Sink Ships
This site discusses article discusses the rules of conduct regarding disclosure of personal and military information that may have compromised military efforts during World War II.
National Archives (UK)
National Archives Learning Curve: British Response to V1and V2
A lesson plan (including primary documents) on how you as an advisor to the British War Cabinet would try to counter the threat of the V-1 "Buzz Bombs".