History Timeline

  • U.S.- Mexico War

    U.S.- Mexico War
    The U.S. Mexico war begins, starting a battle over the border.
  • Treaty of Guadalupe

    Treaty of Guadalupe
    The Mexican-American border took shape with the Treaty of Guadalupe, which ended the Mexican-American War. About 45 percent of the land previously known as Mexico became United States territory.
  • The Gasden Purchase Treaty

    The Gasden Purchase Treaty
    The Gadsden Purchase Treaty is signed.
  • First Border Patrol

    First Border Patrol
    The first border patrol is established to stop Asian workers from coming into the United States through Mexico.
  • The Mexican Revolution

    The Mexican Revolution
    The Mexican Revolution begins and thousands of Mexicans flee across the border for safety.
  • Immigration Act

    Immigration Act
    An Immigration Act that mandates a literacy test for immigrants is passed.
  • Higher Mexican Immigration Rates

    Higher Mexican Immigration Rates
    More than 89,000 Mexicans come into the United States on permanent visas, making 1924 the peak year for Mexican immigration.
  • Mexican Deportations

    Mexican Deportations
    The first round of Mexican deportations forcibly sent millions of illegal immigrants back to Mexico. This included between 500,000 and two million U.S. citizens of Latino ancestry.
  • Operation Wetback

    Operation Wetback
    Operation Wetback takes place. The U.S. Immigration Service deports more than 3.8 million people of Mexican heritage.
  • The Immigration and Naturalization Act of 1965

    The Immigration and Naturalization Act of 1965
    The Immigration and Naturalization Act of 1965 limits immigrants into the United States.
  • The Immigration Act of 1990

    The Immigration Act of 1990
    The Immigration Act of 1990 increases the number of immigrants allowed into the United
    States each year to 700,000. Ten thousand permanent resident visas are offered to those immigrants
    agreeing to invest at least $1 million in U.S. urban areas or $500,000 in U.S. rural areas.
  • The North American Free Trade Agreement

    The North American Free Trade Agreement
    The North American Free Trade Agreement comes into affect, stimulating trade between the United States and Mexico. Massive increases in border populations occur due to the treaty.
  • Bill Clinton Limits Illegal Immigration

    Bill Clinton Limits Illegal Immigration
    Bill Clinton makes strong moves to limit illegal immigration with hopes of getting re-ellected. With his power, U.S. Border Patrols are bolstered, sensors are installed and 40 miles of 14-foot fence is built to deter the flow of illegal immigrants.
  • High Illegal Immigrant Rates

    High Illegal Immigrant Rates
    Statistics show that 62% of all unauthorized immigrants in the United States were from Mexico.
  • SB1070

    SB1070
    SB1070 was passed in Arizona which allows law enforcement officials who have not been trained in immigration policy to demand papers from any Arizona residents they deem suspicious.