George Washington’s reception at Trenton is hosted by the Ladies of Trenton as he journeys to New York City for his first inauguration.📜 CITIES🌍 UNITED STATES🗓️ 21 April 1789Event on April 21, 1789
John Adams sworn in as first US Vice President (nine days before George Washington).📜 WARS🌍 UNITED STATES🗓️ 21 April 1789Founding Father, U.S. president from 1797 to 1801
Texas Revolution: The Battle of San Jacinto: Republic of Texas forces under Sam Houston defeat troops under Mexican General Antonio López de Santa Anna.📜 WARS🌍 UNITED STATES🗓️ 21 April 18361835–1836 rebellion
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📜 WARS🌍 UNITED STATES🗓️ 21 April 18981898 conflict between Spain and the United States
United Air Lines Flight 736 collides with a United States Air Force fighter jet near Arden📜 CITIES🌍 UNITED STATES🗓️ 21 April 19581958 mid-air collision in Nevada
The Seattle World’s Fair (Century 21 Exposition) opens. It is the first World’s Fair in the United States since World War II.📜 WARS🌍 UNITED STATES🗓️ 21 April 1962World's fair held in Seattle, Washington
The 1964–1965 New York World’s Fair opens for its second and final season.📜 CITIES🌍 UNITED STATES🗓️ 21 April 1965World's fair held in New York City
A tornado outbreak in Illinois📜 HISTORICAL EVENTS🌍 UNITED STATES🗓️ 21 April 1967Weather event in the United States
Astronauts John Young and Charles Duke fly Apollo 16’s Apollo Lunar Module to the Moon’s surface📜 HISTORICAL EVENTS🌍 UNITED STATES🗓️ 21 April 1972American astronaut and lunar explorer (1930–2018)
The compound of the militant group The Covenant📜 HISTORICAL EVENTS🌍 UNITED STATES🗓️ 21 April 1985American far-right militant group active during the 1970s and 80s
Freedom of religion is granted to the Jews of New Amsterdam (later New York City).📜 CITIES🌍 GLOBAL🗓️ 20 April 1657Human right to practice, or not, a religion without conflict from governing powers
Start of Konbaung–Hanthawaddy War📜 WARS🌍 GLOBAL🗓️ 20 April 1752Conflict between states of Burma (Myanmar) from 1752–57
George Washington arrives at Grays Ferry📜 INDIAN ARMY🌍 UNITED STATES🗓️ 20 April 1789U.S. Founding Father, president from 1789 to 1797
U.S. Congress passes an act creating the Wisconsin Territory.📜 HISTORICAL EVENTS🌍 UNITED STATES🗓️ 20 April 1836Bicameral legislature of the United States
Thaddeus S. C. Lowe📜 CHEMISTRY🌍 UNITED STATES🗓️ 20 April 1861American aeronaut, scientist and inventor (1832–1913)
American Civil War: Robert E. Lee resigns his commission in the United States Army in order to command the forces of the state of Virginia.📜 POLITICS🌍 UNITED STATES🗓️ 20 April 18611861–1865 conflict in the United States
U.S. President William McKinley signs a joint resolution to Congress for declaration of war against Spain📜 WARS🌍 UNITED STATES🗓️ 20 April 1898President of the United States from 1897 to 1901
Amethyst incident: The People’s Liberation Army attacks HMS Amethyst (F116) travelling to the British embassy in Nanjing during the Chinese Civil War.📜 INDIAN ARMY🌍 UNITED KINGDOM🗓️ 20 April 1949Chinese civil war incident
Apollo program: Apollo 16 Lunar Module📜 HISTORICAL EVENTS🌍 UNITED STATES🗓️ 20 April 19721961–1972 American crewed lunar exploration program