The Mexican War of Independence (1810-1821) was Mexico's struggle for independence from Spanish colonial rule. It started as an idealistic peasants' rebellion against their colonial masters but finally ended as an unlikely alliance between liberales (liberals) and conservadores (conservatives).
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Beginning of the War

The plans were disclosed to the central government, and the conspirators were alerted — famously, by Josefa Ortiz de Domínguez, la Corregidora, the wife of the Magistrate of Querétaro — that orders had been sent for their arrest. Pressed by this new development, on September 16, 1810, Hidalgo decided to strike out for independence without delay (this date is celebrated as Mexico's independence day). The church bells summoned the people, and Hidalgo asked them to join him against the Spanish government and the peninsulares in the famous Grito de Dolores (Cry of Dolores): "Long live Our Lady of Guadalupe! Death to bad government! Death to the gachupines!" The crowd responded enthusiastically, and soon an angry mob was marching toward the regional capital in Guanajuato. The miners of Guanajuato joined with the native workers of Dolores in the massacre of all the peninsulares who resisted them, including the local chief colonial official, the intendente..