On their way back to Bengal, the army passed through the plains of Kamrup (now North Bengal), while going through the territory of Kamrup in the sub-alpine Himalayan hills, where his army crossed the ancient stone bridge on the foothills near the Teesta river. The forces found the arches in the bridge to be destroyed by the Kamrup forces which made it difficult to cross the deep river. In a desperate attempt to reach the other side of the river at Devkot, Khalji's forces lost a number of men and horses. It is said that of the 10,000-strong army that had marched into Tibet, only around 100 men returned. After crossing the river, Ali Mech guided Bhaktiyar Khilji back to Devkot (present-day Dakshin Dinajpur district, West Bengal).
