noun
Historical abbreviation for ソビエト連邦. Used in contexts referring to the former Soviet Union.
See also: ソビエト連邦
ソ連は1991年に崩壊した。
The Soviet Union collapsed in 1991.
During the Cold War, the US and the USSR were in conflict.
Full formal name; ソ連 is the common abbreviation.
Abbreviation of ソビエト連邦 (Soviet Union), from Russian 'Sovetskiy Soyuz'.