A former Marine has donated $12-million for the National Museum of the Marine Corps to expand its displays to include U.S. military engagements since the Vietnam War, The Free Lance-Star of Fredericksburg, Va., reports.

The gift from the Timothy T. Day Foundation to the Marine Corps Heritage Foundation, a private nonprofit organization that operates the museum in Triangle, Va., will support development of the final gallery, set to open in 2017. The exhibit will focus on Marines who served in Beirut, Somalia, Afghanistan, and the two Gulf wars.

Mr. Day is the chairman and CEO of Bar-S Foods in Arizona. His gift, announced Tuesday, is the largest ever for the Marine Corps museum foundation.