The 6th Army was driving towards Stalingrad, for a long period unsupported by 4th Panzer Army, which had been diverted to help 1st Panzer Army cross the Don , By the time the 4th Panzer Army had rejoined the Stalingrad offensive Soviet resistance (comprising the 62nd Army under Vasily Chuikov) had stiffened. A leap across the Don brought German troops to the Volga on 23 August but for the next three months the Wehrmacht would be fighting the Battle of Stalingrad street-by-street. Towards the south, the 1st Panzer Army had reached the Caucasian foothills and the Malka River, At the end of August Romanian mountain troops joined the Caucasian spearhead, while the Romanian 3rd and 4th armies were redeployed from their successful task of clearing the Azov littoral. They took up position on either side of Stalingrad to free German troops for the main offensive. Mindful of the continuing antagonism between Axis allies Romania and Hungary over Transylvania, the Romanian army in the Don bend