1915 (MCMXV, in Roman numerals) was a common year of the 20th century of the current Gregorian Calendar, of the Age of Christ, and its Sunday letter was C, had 52 weeks, beginning on a Friday and also ending on a Friday. fair.
Álvaro Figueroa y Torres Mendieta replaces Eduardo Dato y Iradier as president of the government of Spain.
April 5 - Contestado War: Major assault on Santa Maria puts an end to conflict in the region.
April 22 - For the first time in history chemical weapons are used in an armed conflict, when Germany uses chlorine gas as poisonous gas against the French army in one of the battles of the First World War.
April 24 - is considered the beginning of the Armenian Genocide, which left approximately 1,500,000 Armenian victims.
May 7 - Torpedoing and sinking of the British ocean liner RMS Lusitania of the Cunard Line by a German submarine. 1,198 dead, including 128 Americans. The incident caused great commotion as the Lusitania was a very popular passenger ship that had already stopped the Fita Azul for the fastest crossing of the Atlantic and its sinking caused the death of civilians. Since American citizens died in the shipwreck, this increased Americans' expectation of entering the War, but this would only occur two years later, in 1917.
June 15 - foundation of Três Lagoas, a Brazilian municipality located in the state of Mato Grosso do Sul.
September 8 - Assassination of Senator Pinheiro Machado.
September 30 - foundation of São Gotardo, a Brazilian municipality located in the State of Minas Gerais
December 12 - Yuan Shikai until then President of China, self-proclaimed New Emperor of China, but his rule was short and he died on June 6, 1916, and then Li Yuanhong came to power, his rule lasted from June 7 from 1916 until his term was interrupted on July 1, 1917 by a coup attempt to restore the Monarchy, trying to put Pu Yi to power, but Pu Yi ruled only 12 days, until on July 12, 1917 the coup failed. and the Republic is re-established again, and Li ruled China until July 17, 1917, when he resigned, returning to power on June 11, 1922, until June 13, 1923, when Gao Lingwei assumed the Presidency of the Republic of China. .
December 18 - The Sergeants' Revolt takes place, pro-parliamentary, which is quelled.
December 23 - The HMHS Britannic, sister ship of the RMS Titanic, makes its maiden voyage, not as a passenger ship, but as a hospital ship, a role it would exercise until its sinking on November 21 of the following year, ending its career without ever not even carry a passenger.
March 20 – Rudolf Kirchschläger, was an Austrian politician and president of Austria from 1974 to 1986 (d. 2000).
September 11 - Raúl Alberto Lastiri, president of Argentina in 1973 (d. 1978).
September 11 - Pedro Cardoso de Souza, Plastic Artist (d. 2007).
November 24 – Alexander Nove, Russian-British economist and historian (d. 1994).
November 25 - Augusto Pinochet, former Chilean dictator (d. 2006).
December 2 - Marais Viljoen, President of State of South Africa in 1978 and from 1979 to 1984 (d. 2007).
December 12 - Frank Sinatra, American singer and actor (d. 1998).
December 13 - Balthazar Johannes Vorster, President of State of South Africa from 1978 to 1979 (d. 1983).
December 19 – Édith Piaf, famous and important French singer (d. 1963).
March 21 - Frederick Taylor, the "Father of Scientific Management", creator of Taylorism.
April 9 - Friedrich Loeffler, German physician, bacteriologist and hygienist (b. 1852).
July 1 – Porfirio Díaz, president of Mexico in 1876, from 1877 to 1880 and from 1884 to 1911 (b. 1830).
July 16 - Ellen G. White, prophetess (b. 1827).
September 08 - Pinheiro Machado, senator from Est