During the Warsaw Ghetto Uprising, by the end of 1942, the Jews trapped in the Warsaw Ghetto learned that the deportations were part of an extermination process, as the deportees were sent to death camps. Many of the remaining Jews decided to revolt. The first armed resistance in the ghetto occurred in January 1943. On 19 April 1943, Passover eve, the Nazis entered the ghetto. The remaining Jews knew that the Nazis would murder them all and they decided to resist the Nazis to the last, rather than surrender.