The first two require a major history rewrite to get the German equipment to Syria.
In OTL, Syria was under French control when the war started, under Vichy control following
the French campaign, invaded and taken over by Free French and British forces in 1941,
Free French control until "independence" in 1944 (on paper, the French stayed through 1946
and actually bombed Damascus in May 1945 and attempted to arrest the democratically
elected Syrian leaders), declared war on Germany and Japan in February 1945. True
independence April 1946.
So, the US vehicles would be more likely
"real world" terms,
, but I could see a captured
and refurbished ex-Afrika Korps Stug III assigned to the new Syrian Army.