On June 3rd, 1539, Spanish explorer Hernando De Soto claimed Florida for Spain.
June 3rd can also be considered the “birthday” of the U.S. Army. (It was established by Congress on June 3rd, 1784.)
Also on this day, in 1911, actress Ellen Corby was born. She is often remembered for her role as Grandma Walton, in the television series The Waltons.