On 28 January 1945, the Burma Road was fully restored as a land transport route for war material supplied to China by the Allies. It had been cut off when Japanese invaded Burma in 1942, leaving available only the air supply route over The Hump, from Assam, India, over the eastern end of the Himalayas. The re-opening of the Burma Road greatly increased the supply of aircraft, spare parts, fuel and other war material as required for the successful prosecution of the war.