After the outbreak of the war with Japan in 1941, the government of Assam undertook a number of 'forward policy' measures to tighten their hold on the North East Frontier Agency (NEFA) area, which later became Arunachal Pradesh. In 1944, administrative control was extended over the area of the Tawang tract lying South of the Sela Pass when J.P. Mills set up an Assam Rifles post at Dirang Dzong. However, no steps were taken to evict the Tibetan from the area North of the pass which contained Tawang town.