M21 mortar motor carriage
M21 mortar motor carriage is a mortar carrier or artillery model.
Overview
Type of self-propelled artillery.
In detail
It is associated with United States.
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
“M21 mortar carrier”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q3272546: M21 mortar motor carriage
Consult the source