After Alta California is annexed by the United States, Baja California is further divided into northern and southern territories.
Northern Baja California becomes the 29th state of Mexico. The southern portion, below 28°N, remains a federally administered territory.
The southern territory becomes the 31st state, Baja California Sur.
Ernesto Ruffo Appel of the PAN becomes the first non-PRI governor of Baja California and the first opposition governor of any state since the Revolution.