 Complete the following phrase:  The Gaspar de Portolá land expedition in 1769 led to the founding of Mission San Gabriel by Christian missionary Junipero Serra in 1771 and initiated an era of forced relocation, enslavement, and exposure to Old World diseases. This led to the rapid collapse of Tongva society and lifeways. Resistance and rebellions occurred in retaliation, including an unsuccessful rebellion in 1785 by Nicolás José and female chief Toypurina. In 1821, 