142,000 Jews Deportation of German Jews to concentration camps begins. Experimentation with gassing at Auschwitz begins. United States enters the war after the attack on Pearl Harbor . Deportation of 300,000 Jews from Warsaw ghetto to Nazi death camp at Treblinka begins. Extermination begins at Sobibor, Belzec, and Majdanek camps.
Resistance begins in other ghettos.
First armed resistance in Warsaw ghetto. Bermuda Conference is held. It is a fruitless discussion between the United States and Britain for deliverance to safety of the Nazi victims. German army occupies most of Italy. April 19 through May 16 Liquidation of Warsaw ghetto.