The Treaty of Cahuenga was signed, informally ending the fighting of the Mexican–American War in California.

The Treaty of Cahuenga, also called the Capitulation of Cahuenga, was an 1847 agreement that ended the Conquest of California, resulting in a ceasefire between Californios and Americans. The treaty was signed at the Campo de Cahuenga on 13 January 1847, ending the fighting of the Mexican–American War within Alta California. The treaty was drafted in both English and Spanish by José Antonio Carrillo and signed by John C. Frémont, representing the American forces, and Andrés Pico, representing the Mexican forces.

The Mexican–American War, also known in the United States as the Mexican War, was an invasion of Mexico by the United States Army. It followed the 1845 American annexation of Texas, which Mexico still considered its territory because it refused to recognize the Treaties of Velasco, signed by President Antonio López de Santa Anna after he was captured by the Texian Army during the 1836 Texas Revolution. The Republic of Texas was de facto an independent country, but most of its Anglo-American citizens who had moved from the United States to Texas after 1822 wanted to be annexed by the United States.

Alta California, also known as Nueva California among other names, was a province of New Spain formally established in 1804. Along with the Baja California peninsula, it had previously comprised the province of Las Californias, but was made a separate province in 1804. Following the Mexican War of Independence, it became a territory of Mexico in April 1822 and was renamed Alta California in 1824.