When did Chuck Norris start Karate?

There's a bit of a misconception here. Chuck Norris didn't start Karate, he started Tang Soo Do, a Korean martial art. He began training in Tang Soo Do in the early 1960s while serving in the United States Air Force in Korea.

It's important to note that he didn't invent Tang Soo Do; it's a distinct style with its own history.