Treaty of Zaragoza divides the eastern hemisphere between Spain and Portugal along a line 297.5 leagues (1📜 CITIES🌍 SPAIN🗓️ 22 April 15291529 peace treaty between Spain and Portugal
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.📜 INDIAN ARMY🌍 GLOBAL🗓️ 22 April 18091809 battle of the War of the Fifth Coalition
Texas Revolution: A day after the Battle of San Jacinto📜 WARS🌍 UNITED STATES🗓️ 22 April 18361835–1836 rebellion
Spanish–American War: President William McKinley calls for 125📜 INDIAN ARMY🌍 UNITED STATES🗓️ 22 April 18981898 conflict between Spain and the United States
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.📜 HISTORY🌍 GLOBAL🗓️ 22 April 19151914–1918 global conflict
The United Kingdom📜 HISTORICAL EVENTS🌍 UNITED STATES🗓️ 22 April 19301930 international arms control treaty
World War II: Operation Persecution is initiated: Allied forces land in the Hollandia (currently known as Jayapura) area of New Guinea.📜 HISTORY🌍 GERMANY🗓️ 22 April 19441939–1945 global conflict
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.📜 HISTORICAL EVENTS🌍 INDIA🗓️ 22 April 1944U.S. Air Force special operations unit
World War II: Sachsenhausen concentration camp is liberated by soldiers of the Red Army and Polish First Army.📜 INDIAN ARMY🌍 GERMANY🗓️ 22 April 1945Nazi concentration camp in Oranienburg, Germany
World War II: Prisoners at the Jasenovac concentration camp revolt. Five hundred twenty are killed and around eighty escape.📜 WARS🌍 GLOBAL🗓️ 22 April 1945Concentration camp run by the Ustaše in occupied Yugoslavia during World War II
Arab–Israeli War: The port city of Haifa is captured by Jewish forces.📜 WARS🌍 UNITED KINGDOM🗓️ 22 April 1948Second and final stage of the 1948 Palestine war
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.📜 INDIAN ARMY🌍 UNITED STATES🗓️ 22 April 1951Armed conflict on the Korean Peninsula, 1950–1953
Red Scare: Witnesses begin testifying and live television coverage of the Army–McCarthy hearings begins.📜 INDIAN ARMY🌍 UNITED STATES🗓️ 22 April 1954Phenomenon of US political rhetoric after WWII
Japan’s Prime Minister Junichiro Koizumi apologizes for Japan’s war record.📜 POLITICS🌍 JAPAN🗓️ 22 April 2005Prime Minister of Japan from 2001 to 2006
The Paris Agreement is signed📜 FINANCE🌍 UNITED STATES🗓️ 22 April 20162015 international treaty regarding climate change
Battle of Mutina: Mark Antony is again defeated in battle by Aulus Hirtius📜 CITIES🌍 GLOBAL🗓️ 21 April 2026Battle in 43 BC between Senatorial and Triumvir forces
The Laguna Copperplate Inscription (the earliest known written document found in what is now the Philippines): the Commander-in-Chief of the Kingdom of Tondo📜 HISTORICAL EVENTS🌍 GLOBAL🗓️ 21 April 0900900 inscription found in the Philippines
The last ruler of the Lodi dynasty📜 HISTORICAL EVENTS🌍 INDIA🗓️ 21 April 1526Rulers of the Delhi Sultanate in India, 1451–1526
War of the First Coalition: In the climax of the Montenotte Campaign📜 INDIAN ARMY🌍 FRANCE🗓️ 21 April 17961792–1797 battles between French revolutionaries and neighbouring monarchies