 In 1810, year of the commencement of the war of Mexican Independence (1810–1821), Jose Antonio Yorba, a sergeant of the Spanish army, was granted land that he called Rancho Santiago de Santa Ana.Yorba's rancho included the lands where the cities of Olive, Orange, Irvine, Yorba Linda, Villa Park, Santa Ana, Tustin, Costa Mesa and unincorporated El Modena, and Santa Ana Heights, are today.This rancho was the only land grant in Orange County granted under Spanish Rule.