 Complete the following phrase:  During the Mongol invasion of Russia the southern parts of Novgorod land were devastated; Volok Lamsky, Vologda, Bezhetsk, Torzhok were all captured by the invaders. Several versions have been proposed by historians to explain the Mongols refusal to march on Novgorod after the capture of Torzhok on March 5: the upcoming spring thaw, lack of fodder and high losses in the struggle against the Ryazan and Vladimir principalities. On July 15, 1240, Alexander Yaroslavich defeated the Swedes on the Neva and on April 5, 1242 he won the Battle on the Ice of the lake Peipus against the Livonian Order. In 12571259 he established his influence in Novgorod threatening it with a Mongol pogrom. In 1268, the Livonian order was again defeated in the fierce 