Wikipedia
Tushonka
Tushonka is a kind of canned stewed meat especially popular in the CIS and other countries of the former Soviet Union. It has become a common name for different kinds of canned stewed meat, not all of which correspond to the strict GOST standards.
Tushonka can be used and preserved in extreme situations, and therefore is a part of military food supplies in the CIS. For the people of Soviet Union tushonka was a part of military and tourist food supplies, at some extreme periods of time it could have only been bought with food stamps.