On 16 December, the Soviets launched Operation Little Saturn, which attempted to punch through the Axis army (mainly Italians) on the Don and take Rostov-on-Don. The Germans set up a "mobile defence" of small units that were to hold towns until supporting armour arrived. From the Soviet bridgehead at Mamon, 15 divisions – supported by at least 100 tanks – attacked the Italian Cosseria and Ravenna Divisions, and although outnumbered 9 to 1, the Italians initially fought well, with the Germans praising the quality of the Italian defenders, but on 19 December, with the Italian lines disintegrating, ARMIR headquarters ordered the battered divisions to withdraw to new lines.