I saw this film on "Movies for Men" last night. It is clear that it was filmed in Egypt not Tunisia (as another reviewer suggested)as the Great Pyramids at Giza appear in one shot! Also the "German" tanks in one sequence were Shermans specially fitted with the turret and gun from the French AMX tank. This was a unique and odd-looking variant of the Sherman used only by the Egyptian Army.
To my delight the "British" tanks in the same sequence were Shermans with short - barrelled 75mm M3 guns,correct for the period.This was one of the few war films I have ever seen which features Shermans and of the correct mark. By comparison the critically acclaimed "Patton" was totally inaccurate in its use of M-47,M-24 and M-41 tanks to depict British,German and U.S. Armour.
Even the largely accurate "A Bridge Too Far" features the wrong Mark of Shermans.