Sure they did.
Remember "Lend - Lease act"?
They only had to repaint stars to red ones :-)
well, I don't know the context of trhe photo - whether it is contemporary to the massecre, or whether it is supposed to hacve taken place a few years later, but the first jeeps went into the US army in 1941. I dont' klnow exaclty when the russians got theirs.
Not in 1940. By the time Russians got jeeps, the front would have been much further east.