From (http://www.missionsjc.com/preservation/history.php) The story begins in 1775, when Mission San Juan Capistrano was first founded by Father Lasuen, on October 30th. But just a few weeks after the party of padres and soldiers arrived, they received word of the revolt occurring in San Diego. The founding padres, and soldiers decided to leave San Juan Capistrano, and go back to San Diego to help there. Once things had settled in San Diego, Father Serra personally led a party to re-found Mission San Juan Capistrano on All Saint’s Day, November 1, 1776.
Mission San Juan Capistrano, became the seventh of twenty-one missions to be founded in Alta California. Like the previous six missions, San Juan Capistrano was established to expand the territorial boundaries of Spain, and to spread Christianity to the Native peoples of California. Unlike the British colonies on the East Coast of North America, who brought people from their homeland to form colonies, the Spanish believed they could transform the Native peoples into good Spanish citizens. The idea was to make colonial outposts called missions, led by Franciscan padres and Spanish soldiers. The missions would be a center of learning and training of Native peoples. The Spanish government and Catholic Church wanted to convert the people to Christianity, train them in Spanish or European lifestyle, so that the Native peoples would eventually live in towns and pay taxes, like good Spanish citizens.