Army took a 31-28 lead into halftime and built on its margin in the second half. The Black Knights went on a 13-0 run that was capped by Wilson's jumper with 4:13 left in the second half to give them a 22-point lead -- their largest of the game.
American (10-17, 5-7), which has lost two games in a row, pulled no closer than 14 points the rest of the way.
Mississippi State freshman guard Malik Newman will withdraw from the NBA draft, but sources told ESPN he might explore other opportunities besides returning to Mississippi State.
Seton Hall sophomore Isaiah Whitehead will stay in the NBA draft and not return for his junior season.
Washington State's trio of Josh Hawkinson, Conor Clifford and Ike Iroegbu have withdrawn from the NBA draft and will play their senior season with the Cougars.