-
-
February 4, 1917—A law requiring a literacy test is introduced for immigrants coming to the United States.
-
May 19, 1921—Congress passes the Quota Act, stating that annual immigration is to be limited to 350,000.
-
May 26, 1924—Congress passes the National Origins Act, which reduces the number of immigrants allowed to enter the United States each year. Annual immigration limits continue to fluctuate over several decades.
-
June 9, 1954—President Dwight D. Eisenhower oversees Operation Wetback to control illegal immigration into the United States from Mexico. Many Mexicans are deported.
-
1982—Employers face strict sanctions if they employ illegal aliens.
-
March, 1996—Congress doubles U.S. Border Patrol, and President Bill Clinton cuts some aid for immigrants (both legal and illegal).