Nazi Germany
World War II: German troops kill more than 1,000 political and military prisoners in Gardelegen, Germany.
13 Nisan — Tarihte Bugün
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13 Nisan 2026 · İngilizce Vikipedi · 45 kayıt · Sayfa 3 / 5
Soviet Union
World War II: Soviet and Bulgarian forces capture Vienna.
World War II
World War II: The discovery of mass graves of Polish prisoners of war killed by Soviet forces in the Katyń Forest Massacre is announced, causing a diplomatic rift between the Polish government-in-exile in London and the Soviet Union, which denies responsibility.
Jefferson Memorial
The Jefferson Memorial is dedicated in Washington, D.C., on the 200th anniversary of President Thomas Jefferson's birth.
Soviet–Japanese Neutrality Pact
A pact of neutrality between the USSR and Japan is signed.
A.E.K. (sports club)
A.E.K., a major Greek multi-sport club, is established in Athens by Greek refugees from Constantinople.
Jallianwala Bagh massacre
Jallianwala Bagh massacre: British Indian Army troops led by Brigadier-General Reginald Dyer kill approximately 379–1,000 unarmed demonstrators including men and women in Amritsar, India. Approximately 1,500 are injured.
31 March incident
The 31 March Incident leads to the overthrow of Sultan Abdul Hamid II.
Colfax massacre
The Colfax massacre: More than 60 to 150 black men are murdered in Colfax, Louisiana, while surrendering to a mob of former Confederate soldiers and members of the Ku Klux Klan.
Metropolitan Museum of Art
The New York City Metropolitan Museum of Art is founded.