U.S. Army Chief of Staff, Gen. Mark A. Milley, attends Princeton University Alumni Day where he was awarded the Woodrow Wilson Award, an honor given annually to an alumnus or alumna whose achievements exemplify Woodrow Wilson's phrase, "Princeton in the nation's service", Princeton, N.J., Feb. 20, 2016. Milley explained the distinction and uniqueness for members of the U.S. Military who swear an oath, not to a supreme leader or a piece of land like so many others around the world, but to an idea; an idea that is an integral part of the Constitution of the United States - that we are all created equal. (U.S. Army photographs by Staff Sgt. Chuck Burden / released)