The title says it all:
https://www.popularmechanics.com/mil...rtillery-apcs/
As stocks of ATGMs started running low,
D44 85mm divisional guns would appear on European battlefields of the Twilight War. Developed during WW2, the D44 was produced between 1944-1953. Clearly, given its use in 2023 Ukraine, 85mm ammo for it is still available from reserve stockpiles.
And, of course, the Ukrainians have mounted some D44s on MTLB armored tractors. According to the Popular Mechanics article, the BTR50 was actually designed with the capability of mounting a D44 field gun in mind.
-