Historical Events on April 20

1052 battle in Tunisia

1175 Ayyubid victory over the Zengids

Fought in 1500 between France and Milan

1657 naval battle between Spain and England

War fought between the Konbaung Dynasty and the Restored Hanthawaddy Kingdom of Burma (Myanmar) from 1752 to 1757, ended the Mon people's centuries-long dominance of the south

Treaty between the Netherlands and Portugal

1881 battle fought in Kosovo

Last major engagement of the First Franco-Dahomean War

Earthquakes in Greece

Ludlow Massacre — attack by Colorado National Guard and mine camp guards on striking coal miners

1917 naval battle of the First World War

1921 international treaty

1921 multilateral treaty

1941 air battle in Greece during WWII

Bay of Pigs invasion — failed landing operation of Cuba in 1961

Korean Air Lines Flight 902 — 1978 aircraft accident in the Soviet Union

The Freddie Mercury Tribute Concert for AIDS Awareness — 1992 benefit concert

Columbine High School massacre — school shooting at Columbine High School in Columbine, Colorado, United States on April 20, 1999

Rare earthquake in New York state

2003 San Marino Grand Prix — Formula One motor race held in 2003

Widespread protest in Ecuador

Earthquake in Kalgoorlie, Western Australia

2013 earthquake in Sichuan, China

Battle of the Syrian Civil War