Mexican Independence Timeline (1808-1821) By Johannp Period: Jan 1, 1521 to Sep 16, 1821 New Spain (1521-1821) Period: Jan 1, 1808 to Dec 31, 1815 Peninsular War Period: Jan 1, 1810 to Sep 16, 1821 The Mexican War of Independence (1810-1821) Sep 16, 1810 Cry of Dolores Jul 30, 1811 Miguel Hidalgo's Death Period: Oct 24, 1814 to Nov 5, 1815 Jose Marian Morelos Goberment Jan 1, 1820 Liberals take power of Spain Jan 1, 1820 Plan of Iguala