World War I: Italy secretly signs the Treaty of London pledging to join the Allied Powers. The Treaty of London, officially signed on April 26,…
25 April 1792
“La Marseillaise” (the French national anthem) is composed by Claude Joseph Rouget de Lisle. “La Marseillaise” is the national anthem of France, with a history…
24 April 1993
An IRA bomb devastates the Bishopsgate area of London. The 1993 Bishopsgate bombing was a significant event carried out by the Provisional Irish Republican Army…
23 April 1935
The Polish Constitution of 1935 is adopted. The Polish Constitution of 1935, officially known as the April Constitution, was adopted on April 23, 1935, during…
22 April 1906
The 1906 Intercalated Games open in Athens. The Intercalated Games were a series of Olympic Games that were intended to be held in between the…
21 April 1962
The Seattle World’s Fair (Century 21 Exposition) opens. It is the first World’s Fair in the United States since World War II. The Seattle World’s…
20 April 1902
Pierre and Marie Curie refine radium chloride Pierre and Marie Curie’s work on refining radium chloride was a significant milestone in the field of radioactivity,…
19 April 1927
Mae West is sentenced to ten days in jail for obscenity for her play Sex. Mae West, a bold and charismatic figure in American entertainment,…
18 April 1897
The Greco-Turkish War is declared between Greece and the Ottoman Empire. The Greco-Turkish War of 1897, also known as the Thirty Days’ War, was a…
17 April 1961
Bay of Pigs Invasion: A group of Cuban exiles financed and trained by the CIA lands at the Bay of Pigs in Cuba with the…