A History of Short Words

From the New York Times Crossword Puzzle

USO

Mon, 21 Aug '23
G.I. entertainers
Fri, 7 Jul '23
Private support grp.?
Sat, 29 Apr '23
Grp. with special airport lounges
Wed, 29 Jun '22
Troop troupe, for short
Wed, 1 Sep '21
G.I. entertainers
Fri, 13 Aug '21
Camp show grp.
Wed, 12 May '21
Grp. that supports American troops
Wed, 3 Feb '21
Grp. that brought Stephen Colbert to Baghdad