Zbruch River
On 27 March, the advance guard of the 1st Panzer Army moved west toward the Zbruch river, while the rearguard began a fighting withdrawal, with the rest of the 220,000 men between them. The advanced guard attack went well for the German forces. The northern column quickly captured three bridges over the Zbruch River, while the southern column was battered by a Red Army's 4th Tank Army counterattack which penetrated deep into the pocket, capturing Kamianets-Podilskyi. The loss of this major road and rail hub meant that the escaping Germans had to detour around the city, slowing the movement to a crawl. A counterattack soon cut off the Russians in the city, and the breakout recommenced. Moving by day and night, the kessel kept moving. Soon bridgeheads were formed over the Seret river.