Hispanic History Milestones Click on each time period to learn more about the milestones that occurred. 1513 - 1718 Early Spanish Explorers Reach America 1917 - 1924 Puerto Ricans Granted US Citizenship 1836 - 1898 Battle of the Alamo, Mexican-American War 1821 - 1822 Los Angeles Founded, First Hispanic Congressman Elected 1910 - 1917 Mexican Revolution Drives Immigration to US 1964 - 1965 Civil Rights Act Of 1964 1980 - 1986 Mariel Boatlift 1941 – 1943 Contributions During World War II 1928 First Hispanic Senator Sworn In 2016 - 2020 DAPA, DACA Rulings 1994 - 2003 NAFTA & Prop 187 1966 - 1975 Cesar Chavez Leads Delano Grape Strike 1947 – 1961 Supreme Court Prohibits Segregation for Mexican-American Students 2009 - 2011 Sonia Sotomayor Joins US Supreme Court 1988 - 1993 Multiple Firsts in White House Cabinets Citations