 Complete the following phrase:  The attack began at 06:10 on 17 December. The 22nd Infantry Division attacked the 8th Naval Brigade on the Belbek River, pushing west towards the coast, while the 50th and 132nd Infantry Divisions conducted fixing attacks on the Soviet center. The 22nd succeeded in rolling up the flank of the Naval Brigade after five days of fighting. However, Oktyabrsky ordered its retirement south towards Sevastopol, abandoning Mamaschai and forming a new front north of Belbek city and the Belbek river. In the south, XXX Corps tried and failed to break through with the 72nd and 170th Infantry Divisions. Only minor gains were made against the 172nd Rifle Division, even with help from the Romanian 1st Mountain Brigade. The 79th Naval Brigade and 345th Rifle Division arrived by sea as reinforcements, using the long winter nights and their naval superiority. Meanwhile, the battleship Parizhskaya Kommuna shelled German forces whenever they threatened a breakthrough. The offensive came to an abrupt end when the Red Army staged an 