This document summarizes key policies and events related to Mexican immigration to the United States from the early 20th century to recent years. It outlines increasing restrictions on immigration through U.S. laws from 1903 to 1924. It then examines Mexican immigration and migration patterns from 1900-1930, the Great Depression and mass deportations, and the Bracero program from 1942-1964. The document also discusses immigration reform and control acts of 1986 and 1996, as well as more recent changes including DACA.