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.
Gun laws in Mexico
Following Mexico's independence as the First Mexican Empire in 1822, the Political Provisional Regulation of the Mexican Empire in Article 54 made a reference to the carrying of prohibited arms (in Spanish: "...el porte de armas prohibidas...") and by 1824, following the establishment of the United Mexican States, it was declared that no person shall carry any type of weapon. The inclination to adopt a complete ban on firearms came as a precaution and attempt to prevent another armed insurrection that would put the new republic in jeopardy. After this measure, four years followed without war under President Guadalupe Victoria.