isolate the 155th Guards Regiment, 52nd Guards Rifle Division (of the 23rd Guards Rifle Corps), from the rest of the division but its attempts to sweep the regiment eastward into the flank of the neighbouring 375th Rifle Division (of the 23rd Guards Rifle Corps) had failed when the regiment was reinforced by the 96th Tank Brigade. Hausser, the commander of II SS Panzer Corps, requested aid from the III Panzer Corps to his right but it had no units to spare. By the end of the day, the 3rd SS Division had made very limited progress due in part to a tributary of the Donets river. The lack of progress undermined the advance made by its sister divisions and exposed the right flank of the corps to Soviet forces. The temperatures, reaching over 30 degrees Celsius, and frequent thunderstorms made fighting conditions difficult. The 6th Guards Army, which confronted the attack by the XLVIII Panzer Korps and II SS Panzer Korps, was reinforced with tanks from the 1st Tank Army, the 2nd Guards Tank Corps and the 5th Guards Tank Corps. The 51st and 90th Guards Rifle divisions were moved up to the vicinity of Pokrovka (not Prokhorovka, to the north-east), in the path of the 1st SS Panzer Division. The 93rd Guards Rifle Division was deployed further back, along the road leading from Pokrovka to Prokhorovka. Army Detachment Kempf Facing Army Detachment Kempf, consisting of III Panzer Corps and Corps Raus (commanded by Erhard Raus), was the 7th Guards Army, dug in on the high ground on the eastern bank of the Northern Donets. The two German corps were tasked with crossing the river, breaking through the 7th Guards Army and covering the right flank of the 4th Panzer Army. The 503rd Heavy Tank Battalion, equipped with 45 Tigers, was also attached to the III Panzer Corps, with one company of 15 Tigers attached to each of the corps' three panzer divisions. At the Milkhailovka bridgehead, just south of Belgorod, eight infantry battalions of the 6th Panzer Division crossed the river under heavy Soviet bombardment. Part of a company of Tigers from the 503rd Heavy Tank Battalion was able to cross before the bridge was destroyed. The rest of the 6th Panzer Division was unable to cross further south due to a traffic jam at the crossing, and remained on the western bank of the river throughout the day.