armoured intervention wherever the blow fell and prevent narrow breakthroughs from being enlarged. A significant proportion of his armoured reserve was dispersed and held unusually far forward. The 15th Panzer Division had 125 operational tanks (16 Pz.IIs, 43 Pz.III Ausf H, 43 Pz.III Ausf J, 6 Pz.IV Ausf D, 15 Pz.IV Ausf F) while the 21st Panzer Division had 121 operational combat vehicles (12 Pz.IIs, 38 Pz.III Ausf H, 43 Pz.III Ausf J, 2 Pz.IV Ausf D, 15 Pz.IV Ausf F). Rommel held the 90th Light Division further back and kept the 101st Motorised Division "Trieste" in reserve near the coast. Rommel hoped to move his troops faster than the Allies, to concentrate his defences at the most important point () but lack of fuel meant that once the had concentrated, it would not be able to move again because of lack of fuel. The British were well aware that Rommel would be unable to mount a defence based on his usual manoeuvre tactics but no clear picture emerged of how he would fight the battle and British plans seriously underestimated the Axis defences and the fighting power of the . Battle Phase one: the break-in Prior to the main barrage, there was a diversion by the 24th Australian Brigade, which involved the 15th Panzer Division being subjected to heavy fire for a few minutes. Then at 21:40 (Egyptian Summer Time) on 23 October on a calm, clear evening under the bright sky of a full moon, Operation Lightfoot began with a 1,000-gun barrage. The fire plan had been arranged so that the first rounds from the 882 guns from the field and medium batteries would land along the front at the same time. After twenty minutes of general bombardment, the guns switched to precision targets in support of the advancing infantry. The shelling plan continued for five and a half hours, by the end of which each gun had fired about 600 rounds, about 529,000 shells. Operation Lightfoot alluded to the infantry attacking first. Anti-tank mines would not be tripped by soldiers stepping on them since they were too light. As the infantry advanced, engineers had to clear a path for the tanks coming behind. Each gap was to be wide, which was just enough to get tanks through in single file. The engineers had to clear a route through the Devil's Gardens. It was a difficult task that