augmentee

noun

aug·ment·ee ˌȯg-ˌmen-ˈtē

plural augmentees

: a member of the U.S. military (such as a military reservist or a member of the Navy or Air Force) who is assigned to special duty in a military unit (such as an Army battalion) in order to fill a shortage or to provide particular skills

Shortly after the September 11th attacks, hundreds of these augmentees were mobilized for up to a year and rapidly assimilated into their designated active units.—

Sean Herron, Twice the Citizen, 2004

Michelle and Tony reached a similar breaking point after the sailor returned from the desert after a tour as an individual augmentee, the Navy's term for sailors sent to serve with ground troops.—

Timothy J. Gibbons, Florida Times-Union (Jacksonville), 10 Oct. 2011