After Japan attacked the United States in December 1941, World War II became truly global with battles between the Axis and the Allies occurring on nearly every continent. See full-sized image for analysis.
Historians estimate that about 1,100 Jewish ghettos were established by the Nazis and their allies in Europe between 1933 and 1945. This map shows the locations of the largest ghettos. See full-sized image for analysis.
Joshua Rubenstein, author and associate at Harvard's Davis Center for Russian and Eurasian studies, details the relationship between Nazi Germany and the Soviet Union in the decade before World War II.