President Donald Trump's deployment of the National Guard to Los Angeles in response to immigration protests is the latest in a long history of U.S. elected officials sending troops in hopes of thwarting unrest connected to civil rights protests.

The president has not federalized the National Guard for the purpose of quelling civil unrest or enforcing the law without a state request since 1965. So the last time was when President Lyndon B. Johnson federalized the Guard in order to protect Civil Rights marchers who were marching from Selma to Montgomery, Alabama.