the Soviet counterattack succeeded in stalling the advance of the II SS Panzer Corps throughout the day. By the end of 8 July, II SS-Panzer Corps had advanced about since the start of Citadel and broken through the first and second defensive belts. However, slow progress by the XLVIII Panzer Corps caused Hoth to shift elements of the II SS-Panzer Corps to the west to help the XLVIII Panzer Corps regain its momentum. On 10 July the full effort of the corps was shifted back to its own forward progress. The direction of their advance now shifted from Oboyan due north to the northeast, toward Prokhorovka. Hoth had discussed this move with Manstein since early May, and it was a part of the 4th Panzer Army's plan since the outset of the offensive. By this time, however, the Soviets had shifted reserve formations into its path. The defensive positions were manned by the 2nd Tank Corps, reinforced by the 9th Guards Airborne Division and 301st Anti-tank Artillery Regiment, both from the 33rd Guards Rifle Corps. Though the German advance in the south was slower than planned, it was faster than the Soviets expected. On 9 July, the first German units reached the Psel River. The next day, the first German infantry crossed the river. Despite the deep defensive system and minefields, German tank losses remained lower than the Soviets'. At this point, Hoth turned the II SS Panzer Corps away from Oboyan to attack toward the northeast in the direction of Prokhorovka. The main concern of Manstein and Hausser was the inability of Army Detachment Kempf to advance and protect the eastern flank of the II SS Panzer Corps. On 11 July, Army Detachment Kempf finally achieved a breakthrough. In a surprise night attack, the 6th Panzer Division seized a bridge across the Donets. Once across, Breith made every effort to push troops and vehicles across the river for an advance on Prokhorovka from the south. A linkup with the II SS Panzer Corps would result with the Soviet 69th Army becoming encircled. Battle of Prokhorovka Throughout 10 and 11 July, the II-SS Panzer Corps continued its attack toward Prokhorovka, reaching within of the settlement by the night of 11 July. That same night, Hausser issued orders for the attack to continue the next day. The plan was for the 3rd SS Panzer Division to drive northeast until it reached