June 3rd is considered the “birthday” of the U.S. Army. (It was established by Congress on June 3rd, 1784.)
On June 3rd, 1539, Spanish explorer Hernando De Soto [1] claimed Florida for Spain.
Also on this day, in 1911, actress Ellen Corby [2] was born. She is often remembered for her role as Grandma Walton, in the television series The Waltons.