On  23  December  1941,  Rangoon was bombed by  Japan amidst  World  War  II  hostilities. The attack was sudden and caught the  British off guard.  As the British army retreated,  civilians of non-Burmese origin,  mostly from  India,  began to flee by sailing to Madras, Calcutta or Chittagong from the port of  Rangoon.  However,  the port바카라™s closure in  February  1942  and subsequent closure of different sea routes prompted most evacuees to trek almost  1,000  km north towards the  Indian border.  One route via the  Arakan led to  Chittagong,  another via the  Chindwin valley led to  Manipur and a third route via the northern passes led to Ledo in north Assam. The journey was undertaken by people across social strata, along congested roads plied by laden ox carts and lorries moving slowly in one direction at difficult altitudes.  Estimates suggest that this hurried and unplanned process of evacuation cost anywhere between 10,000 and 50,000 lives due to starvation, exhaustion, diseases, war-related injuries and other reasons. By May 1942, the  Japanese military campaign was over and exit routes were sealed even though refugees continued to trickle into India for another two months.  A  refugee camp survey by the  Indians  Overseas Department of the Government of India counted close to 4,00,000 people, even though the actual number was likely to be upward of half a million as many evacuees had left the camps for their homes in  India.  Essentially,  India already had a full-blown refugee crisis at hand a good five years before the Partition of 1947.