https://www.ushmm.org/wlc/en/article.php?ModuleId=10007306
http://www.history.com/topics/world-war-ii/world-war-ii-history
https://history.state.gov/milestones/1937-1945/lend-lease
https://www.boundless.com/u-s-history/textbooks/boundless-u-s-history-textbook/from-isolation-to-world-war-ii-1930-1943-26/conflict-in-europe-202/america-s-growing-involvement-in-wwii-1109-9746/
http://www.encyclopedia.com/topic/World_War_II.aspx
https://history.state.gov/milestones/1937-1945/us-soviet
https://www.ushmm.org/outreach/en/article.php?ModuleId=10007681
http://ww2-weapons.com/lend-lease-tanks-and-aircrafts/
]https://www.boundless.com/u-s-history/textbooks/boundless-u-s-history-textbook/from-isolation-to-world-war-ii-1930-1943-26/conflict-in-europe-202/america-s-growing-involvement-in-wwii-1109-9746/