So, by the time of the Six-Day War, Israel had in use the M50 and M51 Shermans, M48A3 Patton, Centurion, AMX-13. The Sherman M-50 and the Sherman M-51, were known abroad as the Super Sherman, and were modified versions of the American M4 Sherman tank. The Sherman also underwent extensive modifications, including a larger 105mm medium velocity French gun, a redesigned turret, wider tracks, more armour, and an upgraded engine and suspension. The Centurion was upgraded with the British 105 mm L7 gun prior to the war. During the Six-day War, only 120 of Israel's 250 M48 tanks were combat ready; they were mainly engaged on the Sinai front against the Egyptian army. M48s were also used with mixed results during the 1967 Six-Day War. On the Sinai front, Israeli M48s up-gunned with 105 mm L7 rifled guns were used with success against Egyptian IS-3s, T-54s, T-34s and SU-100s supplied by the Soviet Union in the second battle of Abu-Ageila. However, on the West Bank front, Jordanian M48s were often defeated by Israeli 105mm Centurions and WWII-era M4 Shermans (M-51s up-gunned with 105 mm guns). In pure technical terms, the Patton was superior to the Sherman, with shots at more than 1,000 meters simply glancing off the M48s' armor. However, the 105 mm gun of the Israeli Shermans fired a HEAT round designed to defeat the T-62 tank, which was the Soviet response to the M48's successor in US service, the M60. The Jordanian Pattons' failure on the West Bank could also be attributed to Israeli air superiority. The Israeli Army captured about 100 Jordanian M48 and M48A1 tanks and pressed them into service in their own units after the war.