a very powerful bomb that gets its power from nuclear fission, or the splitting of the nuclei of atoms from elements like plutonium or uranium. They case damage through heat, blast, and radiation.

a form of government in which a single leader has total control, usually featuring suppression of dissent and total control of industry and economy.

a German submarine used in the first half of the 20th century.

a major United States naval base in Hawaii that the Japanese air force attacked without warning on December 7, 1941. Many American lives and ships were lost.

the 33rd President of the United States (1945-1953). After he took over the Allied Forces, he made the decision to drop the atomic bombs on Japan. This decision had radical consequences for the Japanese but began the end of WWII.

The leader of the Nazi party and dictator of Nazi Germany from 1933 to 1945.

in World War II, the day Allied forces started the invasion of France; June 6, 1944.

a political policy of not interfering with the concerns of other countries.

the 32 President of the United States (1933-1945). He was elected during the Great Depression and made it his goal to turn the country's economy around by creating government-funded social and economic programs like the Works Progress Administration and Social Security. During WWII he was the leader of the Allied Powers until his death in 1944.