WHAT HAPPENED ON 21. APRIL
Want to find out what all happened on 21. April

Romulus founds Rome (traditional date). (21. April 753. BC)

Battle of Mutina: Mark Antony is again defeated in battle by Aulus Hirtius, who is killed. Antony fails to capture Mutina and Decimus Brutus is murdered shortly after. (21. April 43. BC)

Prophet Muhammad is born in Makkah. (21. April 571)

The Laguna Copperplate Inscription: the Honourable Namwaran and his children, Lady Angkatan and Bukah, are granted pardon from all their debts by the Commander in chief of Tundun, as represented by the Honourable Jayadewa, Lord Minister of Pailah. Luzon, Philippines. (21. April 900)

The Diocese of Pisa is elevated to the rank of metropolitan archdiocese by Pope Urban II (21. April 1092)

The three-day Lisbon Massacre comes to an end with the slaughter of over 1,900 suspected Jews by Portuguese Catholics. (21. April 1506)

Henry VIII ascends the throne of England on the death of his father, Henry VII. (21. April 1509)

The last ruler of the Lodi Dynasty, Ibrahim Lodi is defeated and killed by Babur in the First Battle of Panipat. (21. April 1526)

The Wignacourt Aqueduct is inaugurated in Malta. (21. April 1615)

The city of Rattanakosin, now known internationally as Bangkok, is founded on the eastern bank of the Chao Phraya River by King Buddha Yodfa Chulaloke. (21. April 1782)

Tiradentes, a revolutionary leading a movement for Brazil's independence, is hanged, drawn and quartered. (21. April 1792)

Two Austrian army corps are driven from Landshut by a First French Empire army led by Napoleon I of France as two French corps to the north hold off the main Austrian army on the first day of the Battle of Eckmühl. (21. April 1809)

Texas Revolution: The Battle of San Jacinto: Republic of Texas forces under Sam Houston defeat troops under Mexican General Antonio López de Santa Anna. (21. April 1836)

Bahá'u'lláh, the founder of the Bahá'í Faith, declares his mission as "He whom God shall make manifest". (21. April 1863)

Norway formally adopts the Krag-Jørgensen bolt-action rifle as the main arm of its armed forces, a weapon that would remain in service for almost 50 years. (21. April 1894)

Spanish–American War: The United States Navy begins a blockade of Cuban ports. When the U.S. Congress issued a declaration of war on April 25, it declared that a state of war had existed from this date. (21. April 1898)

Ypiranga incident: A German arms shipment to Mexico is intercepted by the U.S. Navy near Veracruz, Veracruz. (21. April 1914)

World War I: German fighter ace Manfred von Richthofen, better known as "The Red Baron", is shot down and killed over Vaux-sur-Somme in France. (21. April 1918)

The first Aggie Muster is held as a remembrance for fellow Texas A&M graduates who had died in the previous year. (21. April 1922)

The "Surgeon's Photograph", the most famous photo allegedly showing the Loch Ness Monster, is published in the Daily Mail (in 1999, it is revealed to be a hoax). (21. April 1934)