For a timeline specific to the Revolution in Mexico City and around the country, see here.
The Mexican Revolution begins in earnest with the election of Francisco A. Madero in a disputed 1910 election.
From February 9 to 19, Mexico’s Ten Tragic Days begin with Huerta’s bombardment of the city, and ends with former President Francisco I. Madero, and his Vice President, José María Pino Suárez, assassinated outside of the Lecumberri Palace Prison.
On 15 July, (seemingly moments before WWI erupts in Europe), Huerta bows to pressure, resigns the presidency and flees the country. Victorious “Pancho” Villa forces, accompanied by revolutionary forces under Venustiano Carranza and Alvaro Obregon re-enter the City.
On December 6, 1914, the forces of Emiliano Zapata enter Mexico City, following the famous December 4 meeting with “Pancho” Villa in Xochimilco. Villa’s “Division del Norte,” having arrived the previous July, was a heavily armed, near-professional military force. Nothing like the ragtag “Zapatistas” had ever been seen, at least not in organized numbers in Mexico City. The two armies remained in the city through the winter.
The Constitutional Congress approved a new constitution on 5 February 1917. It was the successor to the Constitution of 1857, and served as a model for both the Russian Constitution of 1918 and the German Weimar Constitution of 1919.
Álvaro Obregón becomes president. Redistribution of lands to peasants begins in fulfillment of promises made during the revolution.