Contra Costa County, California
In 1821 Mexico gained independence from Spain. While little changed in ranchero life, the Mexican War of Independence resulted in the secularization of the missions with the re-distribution of their lands, and a new system of land grants under the Mexican Federal Law of 1824. Mission lands extended throughout the Bay Area, including portions of Contra Costa County. Between 1836 and 1846, during the era when California was a province of independent Mexico, the following 15 land grants were made in Contra Costa County.
Guerrero
Peoples of the territory of Guerrero immediately supported the cause of Miguel Hidalgo y Costilla which would culminate with the Independence of Mexico. During the first part of the Mexican War of Independence, José María Morelos fought on the side of Miguel Hidalgo in the southern part of Mexico, including the Acapulco area and the Costa Grande. However, the insurgents were never able to take the port. They were able to take control of territories in the center of the state. Morelos took Chilpancingo and set up the Congress of Anáhuac, which would publish the document "Sentimentos de la Nación" on 6 November 1813. The Congress of Anáhuac also approved the Act of Independence written by Carlos María Bustamante. Later, the Mexican flag was designed and first sewn in Iguala, after Agustín de Iturbide and Vicente Guerrero joined forces under the Plan of Iguala to end the war in 1821.