A History of Short Words

From the New York Times Crossword Puzzle

USO

Sun, 10 Aug '25
Source of some base humor, for short?
Fri, 16 May '25
Nonprofit grp. founded during W.W. II
Sun, 4 May '25
Grp. with so-called "camp shows"
Thu, 6 Mar '25
Troupe for troops, in brief
Sun, 8 Dec '24
Troop grp.
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