In addition to Flag Day, June 14 marked the 236th anniversary of the United States Army.
Americans across the nation gathered to commemorate both events, including a ceremony by the Sons of the American Revolution in Norfolk, Va.
Norfolk is home to the Douglas MacArthur memorial. MacArthur commanded Allied Forces in the Pacific during World War II and officiated the surrender of Japanese forces that ended the war.
He was also one of only five men to rise to the rank of five star general.
Click play to learn more about Gen. Douglas MacArthur.
The U.S. Army celebrated its anniversary with a wreath laying at the Tomb of the Unknowns as well as events at the Pentagon and on Capitol Hill.
President Barack Obama sent a letter to Army officials thanking them for their service.
"Performing your duties with impeccable courage, commitment and character as members of the United States Army, you embody the highest ideals of our nation," he said.