May 21, 1920, the fourth day of April (Gengshen years), Mexico's first president, Carranza's death.

Carranza, December 29, 1859. Participate in Madero led the fight against Dias in 1910 as governor of the state of Coahuila. 1913 led his army against Huerta killed Madero's. April 1915, Carranza's forces defeated Villa's army, Carranza's death "target =" _blank "> Carranza provisional president. Become a legal president on May 1, 1917, with Billy Asia and Zapala continue conflict caused widespread social discontent and unrest, but due to delays in land reform in April 1914, he was opposed to the U.S. Mexican land erosion. March 1916 to prevent U.S. military expedition into Mexico In 1918, the oil industry on Mexico's under control and angered the United States he is fanatical nationalists leaving office in December 1920, decided to force their selected succession was opposed after opposition in 1920 May 21 killings.