Births on April 3

Mario Lavista, Mexican composer

Mario Lavista (April 3, 1943 – November 4, 2021) was a Mexican composer, writer and intellectual.

30 May

Auschwitz concentration camp
The Holocaust: Josef Mengele becomes chief medical officer of the Zigeunerfamilienlager (Romani family camp) at Auschwitz concentration camp.
19 Jun

Pittsburgh Steelers
The Philadelphia Eagles and Pittsburgh Steelers in the NFL merge for one season due to player shortages caused by World War II.
5 Jul

Battle of Kursk
World War II: German forces begin a massive offensive against the Soviet Union at the Battle of Kursk, also known as Operation Citadel.
6 Nov

Kiev
World War II: The Soviet Red Army recaptures Kiev. Before withdrawing, the Germans destroy most of the city's ancient buildings.
4 Dec

Josip Broz Tito
World War II: In Yugoslavia, resistance leader Marshal Josip Broz Tito proclaims a provisional democratic Yugoslav government in-exile.