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.
Military history of Mexico
In 1821 Agustín de Iturbide, a former Spanish general who switched sides to fight for Mexican independence, proclaimed himself emperor – officially as a temporary measure until a member of European royalty could be persuaded to become monarch of Mexico (see First Mexican Empire for more information). A revolt against Iturbide in 1823 established the United Mexican States. In 1824 Guadalupe Victoria became the first president of the new country; his given name was actually Félix Fernández but he chose his new name for symbolic significance: Guadalupe to give thanks for the protection of Our Lady of Guadalupe, and "Victoria", which means Victory.