He started an annual Military Appreciation Day during training camp and invites wounded warriors as his guests to every home game.
The Ravens visited Gettysburg, Pa., last summer for players to learn about Civil War history.
Two years ago, Harbaugh won the Outstanding Civilian Service Award. It was presented to him by Army Chief of Staff Gen. Raymond Odierno.
"The Salute to Service Award provides a unique opportunity to recognize individuals who are going above and beyond to support military and their families," USAA assistant vice president of media and sponsorship marketing Don Clark said in a statement. "Coach Harbaugh and Jared Allen show an exemplary commitment to honoring and supporting the military community and their families. We are thrilled to highlight their work and inspire others to do the same."