The other column on the left of the general line of advance, under Colonel Watson, none the less took Buxa without the “ghosts” raising any objection; while one of the right columns reached Dewangiri and the Darungah Pass after a brief skirmish, and the other marched on Bishensing without meeting the enemy. The formal annexation of the country was ordered, and a chain of military posts fixed for the garrison of the country until its government had become settled. But the Bhotanese made a second bid for freedom in 1866, and there was some brisk fighting at Dewangiri, which was for a time practically invested, as the Darungah Pass was held by the enemy. Water was running short, and, seeing little hope of reinforcement, Colonel Campbell decided on retreating by the Libia Pass, and was compelled to abandon his guns on the march. Attacks were made afterwards on all the hill posts from Dewangiri to Chamoorchee, at Bishensing, Buxa, and Tazagong, and it was evident that the force there was insufficient to quell the now extensive rising. More artillery, the 55th and 80th Regiments, and three native battalions, under General Tombs, C.B., V.C., were hurried up. This was to act on the right, the other troops under Fraser on the left wing, for the reconquest of the country; and when Balla, Buxa, and Chamoorchee were taken with but little fighting by Fraser, as well as the stockades in the Balader Pass, the Darungah Pass, and Dewangiri (where the enemy made an ineffective stand), the war practically ceased; though after these active hostilities it was found necessary to despatch a strong force to check a tendency to further disturbance, though there was no more fighting. Nothing of any note occurred until 1872, when the introduction of tea-planting into Assam led to a considerable immigration of Europeans, and offered greater temptations to the Lushai hill tribes to make incursions into the richer districts at the foot of the mountains. As far back as 1840 these people had been troublesome, and a punitive expedition had been despatched in 1850; but numerous outrages and forays had occurred in 1862 and 1869, and the Indian Government at length decided on the suppression of the annoyance.