WARPACT Arms Stockpiles

[ArmySGT.]

Those came from Syria.

Syria purchased WW2 German arms from the cash strapped Soviets.

A Panzer IV was captured on the Golan heights by the Israelis.

[StainlessSteelCynic]

In the case of the Panzer IV and also StuG III, Syria obtained a number of them from France. Apparently France had enough of them "left lying around from a previous war", that they could refurbish them and offer them for sale.
In something of a twist, these Syrian Panzers faced Israeli Centurions during the "Water War" of 1965.
Syria obtained more Panzer IV tanks from Spain and these saw combat during the 1967 Six-Day War where , in another twist, they faced Israeli Sherman tanks.