April 25, 1943:
- April 22: "The Jews of Amersfoort, Holland, are deported.
- April 25: "As fires set by Germans consume the Warsaw Ghetto, a German Jew named Hoch desperately leaps from a fourth-floor window, breaking both arms and his spine; See Late April 1943
- Late April: "Jewish resistance in the Warsaw Ghetto begins to falter as bunkers are broached by German troops.
Artillery bombardment of the ghetto has foiled Jewish strategy of engaging Germans in costly hand-to-hand combat; See May 1943."
- The Katyn Massacre
"In April 1943 members of the German Army discovered a mass grave in a heavily forested area just outside of Katyn, a remote Soviet village. An international commission of physicians identified the bodies -- 4,143 discovered, but thousands more believed to be killed -- as Polish officers and soldiers.
According to the report issued by the German government, the men were captured by the Soviets during the 1939 Polish campaign; each was killed with a single shot to the nape of the neck just prior to the German invasion of Russia.
"When the Polish government-in-exile in London concurred with the report, Soviet leader Joseph Stalin broke off relations with the civilian regime and claimed that the Germans had committed the murders.
The Allies upheld Stalin's claim until 1952, when a United States congressional inquiry concluded that the Soviet secret police were responsible.
In April 1990 the Soviet Union acknowledged its responsibility for the Katyn Massacre."