Did you know
In 1930, The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding. This featured entry focuses on the immediate decision and its direct historical impact.
April 22 in History
1930 — The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding
April 22 spans 35 recorded events across recorded history, from 960 to 2025. Below is a curated digest of the most significant moments tied to this date.
By thisDay.info Editorial Team · — Wikipedia
Historical Events
35 events
960 – 2025
Today in history
More major events on April 22
The featured story and these ranked highlights form a quick summary. Every recorded event remains available in the chronology below.
- 1945 World War II: Sachsenhausen concentration camp is liberated by soldiers of the Red Army and Polish First Army. Source
- 1944 World War II: The 1st Air Commando Group using Sikorsky R-4 helicopters stage the first use of helicopters in combat with combat search and rescue operations in the China Burma India Theater. Source
- 1809 The second day of the Battle of Eckmühl: The Austrian army is defeated by the First French Empire army led by Napoleon and driven over the Danube in Regensburg. Source
Did you know
The London Naval Treaty, officially the Treaty for the Limitation and Reduction of Naval Armament, was an agreement between the United Kingdom, Japan, France, Italy, and the United States that was signed on 22 April 1930. This helps explain why the event mattered beyond the initial announcement.
Did you know
Seeking to address issues not covered in the 1922 Washington Naval Treaty, which had created tonnage limits for each nation's surface warships, the new agreement regulated submarine warfare, further controlled cruisers and destroyers, and limited naval shipbuilding. This clarifies the institutional and public response around the event.
Did you know
In 1930, The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding had consequences that extended beyond the first headline. The key context is the institutions involved, the policy shift, and how the public response evolved afterward.
Did you know
In 1930, The United Kingdom, Japan and the United States sign the London Naval Treaty regulating submarine warfare and limiting shipbuilding had consequences that extended beyond the first headline. The key context is the institutions involved, the policy shift, and how the public response evolved afterward.
960
Basil II is crowned co-Emperor of the Byzantine Empire.
Byzantine emperor from 976 to 1025
1073
Election of Pope Gregory VII following the death of Pope Alexander II.
Head of the Catholic Church from 1073 to 1085
1500
Portuguese navigator Pedro Álvares Cabral lands in Brazil (discovery of Brazil).
Portuguese explorer (c. 1467/8 – c. 1520)
1519
Spanish conquistador Hernán Cortés establishes a settlement at Veracruz, Mexico.
Spanish and Portuguese colonizers of the Age of Discovery
1529
Treaty of Zaragoza divides the eastern hemisphere between Spain and Portugal along a line 297.5 leagues (1,250 kilometres (780 mi)) east of the Moluccas.
1529 peace treaty between Spain and Portugal
1809
The second day of the Battle of Eckmühl: The Austrian army is defeated by the First French Empire army led by Napoleon and driven over the Danube in Regensburg.
1809 battle of the War of the Fifth Coalition
1836
Texas Revolution: A day after the Battle of San Jacinto, forces under Texas General Sam Houston identify Mexican General Antonio López de Santa Anna among the captives of the battle when some of his fellow soldiers mistakenly give away his identity.
1835–1836 rebellion
1864
The U.S.
Congress passes the Coinage Act of 1864 that permitted the inscription In God We Trust be placed on all coins minted as United States currency.
1876
The first National League baseball game is played at the Jefferson Street Grounds in Philadelphia.
League within Major League Baseball
1889
At noon, thousands rush to claim land in the Land Rush of 1889.
Within hours the cities of Oklahoma City and Guthrie are formed with populations of at least 10,000.
1898
Spanish–American War: President William McKinley calls for 125,000 volunteers to join the National Guard and fight in Cuba, while Congress more than doubles regular Army forces to 65,000.
1898 conflict between Spain and the United States
1906
The 1906 Intercalated Games open in Athens.
International multi-sport event in Greece
1915
World War I: The use of poison gas in World War I escalates when chlorine gas is released as a chemical weapon in the Second Battle of Ypres.
Global conflict from 1914 to 1918
1944
World War II: The 1st Air Commando Group using Sikorsky R-4 helicopters stage the first use of helicopters in combat with combat search and rescue operations in the China Burma India Theater.
Global conflict (1939–1945)
1944
World War II: In Greenland, the Allied Sledge Patrol attack the German Bassgeiger weather station.
1944
World War II: Operation Persecution is initiated: Allied forces land in the Hollandia (currently known as Jayapura) area of New Guinea.
Battle of the Western New Guinea campaign of World War II
1945
World War II: Prisoners at the Jasenovac concentration camp revolt.
Five hundred twenty are killed and around eighty escape.
1945
World War II: Sachsenhausen concentration camp is liberated by soldiers of the Red Army and Polish First Army.
Nazi concentration camp in Oranienburg, Germany
1948
Arab–Israeli War: The port city of Haifa is captured by Jewish forces.
Second and final stage of the 1948 Palestine war
1951
Korean War: The Chinese People's Volunteer Army begin assaulting positions defended by the Royal Australian Regiment and the Princess Patricia's Canadian Light Infantry at the Battle of Kapyong.
1950–1953 conflict on the Korean Peninsula
1954
Red Scare: Witnesses begin testifying and live television coverage of the Army–McCarthy hearings begins.
Phenomenon of US political rhetoric after WWII
1966
American Flyers Airline Flight 280/D crashes on approach to Ardmore Municipal Airport in Ardmore, Oklahoma, killing 83.
1966 aviation accident
1969
British yachtsman Sir Robin Knox-Johnston wins the Sunday Times Golden Globe Race and completes the first solo non-stop circumnavigation of the world.
British yacht racer (born 1939)
1969
The formation of the Communist Party of India (Marxist–Leninist) is announced at a mass rally in Calcutta.
Far-left political party in India from 1969 to 1972
1970
Chicano residents in San Diego, California occupy a site under the Coronado Bridge, leading to the creation of Chicano Park.
City in California, United States
1974
Pan Am Flight 812 crashes on approach to Ngurah Rai International Airport in Denpasar, Bali, Indonesia, killing all 107 people on board.
1974 aviation accident in Indonesia
1977
Optical fiber is first used to carry live telephone traffic.
Light-conducting fiber
1992
A series of gas explosions rip through the streets in Guadalajara, Mexico, killing 206.
Ignition of air and flammable gas
1993
Eighteen-year-old Stephen Lawrence is murdered in a racially motivated attack while waiting for a bus in Well Hall, Eltham.
1993 killing in London, England
2005
Japan's Prime Minister Junichiro Koizumi apologizes for Japan's war record.
Prime Minister of Japan from 2001 to 2006
2016
The Paris Agreement is signed, an agreement to help fight global warming.
2015 international treaty regarding climate change
2020
Four police officers are killed after being struck by a truck on the Eastern Freeway in Melbourne while speaking to a speeding driver, marking the largest loss of police lives in Victoria Police history.
Traffic accident in Victoria, Australia
2025
At least 26 people are killed in a terrorist attack on a group of tourists in Pahalgam, Jammu and Kashmir.
The Resistance Front (TRF), an offshoot of the Pakistan-based militant group Lashkar-e-Taiba claimed responsibility for the attack.