In History, Today on April 21

Henry VIII ascended to the throne of England following the death of his father, Henry VII.

The city of Rattanakosin, now known as Bangkok, was founded as the capital of the Kingdom of Siam (modern-day Thailand).

The Battle of San Jacinto took place, resulting in a decisive victory for the Texian Army over Mexican forces, leading to the independence of Texas from Mexico.

German fighter ace Manfred von Richthofen, known as the 'Red Baron', was shot down and killed during World War I.

Brasília was officially inaugurated as the capital of Brazil, replacing Rio de Janeiro.

The Seattle World's Fair, also known as the Century 21 Exposition, opens in Seattle, Washington.

South Vietnamese President Nguyễn Văn Thiệu resigned amid the fall of Saigon during the Vietnam War.

The Tiananmen Square protests began in Beijing, China, as students gathered to mourn the death of Hu Yaobang and demand political reform.

The city of Baghdad fell to U.S. forces during the Iraq War, marking a significant moment in the conflict as the capital city was secured by coalition forces.

The Deepwater Horizon oil spill began in the Gulf of Mexico, leading to one of the largest environmental disasters in U.S. history.

The Flint water crisis began when the city switched its water supply to the Flint River, leading to lead contamination and a public health emergency.

The iconic musician Prince is found dead at his Paisley Park home and recording studio in Minnesota, leading to an outpouring of grief and tributes worldwide.

A series of coordinated terrorist bombings occurred in Sri Lanka on Easter Sunday, targeting churches and hotels, resulting in over 250 deaths.