National Archives (UK)
Uk National Archives: First World War Sources for History
A comprehensive site filled with historically significant documents on the UK during World War I.
Other
U.s. Centennial Flight Commission: Air Power:the Battle of Britain
Read a concise account of the Battle of Britain, Adolf Hitler's attempt to conquer Great Britain in the summer of 1940. See how the British prevailed and what mistakes the Germans made.
Independence Hall Association
U.s. History: The Arsenal of Democracy
Although Americans remained isolationist in their thinking, President Roosevelt understood that the European allies needed help against the Germans. Read about the incremental ways America became involved in World War II in Europe...
Ducksters
Ducksters: World War Ii History: Battle of Britain for Kids
Kids learn about the history of the Battle of Britain during World War II. Germany bombs England and London for months.