Katyusha
Katyusha is a multiple rocket launcher or missile vehicle.
Also recorded as Katyusha rocket launcher.
Overview
Soviet/Russian multiple launch rocket system.
In detail
It is associated with Soviet Union.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Katyusha rocket launcher”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q192223: Katyusha
Consult the source