A History of Short Words

From the New York Times Crossword Puzzle

USSR

Fri, 1 Apr '22
Federation formed in 1922, for short
Wed, 9 Mar '22
Losing team in the "Miracle on Ice" hockey game
Fri, 18 Feb '22
Red states, once, in brief
Tue, 16 Nov '21
Leningrad's land, for short
Sat, 7 Aug '21
It raised a major red flag
Thu, 29 Jul '21
Founding member of the U.N. Security Council
Sat, 17 Jul '21
Name in a noted '90s breakup