Nagaland and Manipur border at two locations. One of the locations was near Ukhrul in Manipur. The army attacked two militants' transit camps. 70 commandos were reportedly involved in the operation. The commandos, equipped with assault rifles, rocket launchers, grenades and night vision goggles, were divided into two groups. The teams trekked through the thick jungles for at least before they reached training camps. Each of the teams was further divided into two sub-groups. While one was responsible for the direct assault, the second formed an outer ring to prevent any of insurgents from running and escaping. The actual operation (hitting the camp and destroying it) took about 40 minutes. Indian Air Force Mil Mi-17 helicopters were put on standby, ready to be pressed into service to evacuate the commandos in case anything went wrong. In its statement after the operation, the Indian Army said it was in communication with Myanmar and that, "There is a history of close cooperation between our two militaries. We look forward to working with them to combat such terrorism." The Indian Army claimed to have inflicted heavy casualties (158 reported) on the attackers behind the ambush of the Army on 4 June, which claimed the lives of 18 Army jawans (soldiers) of 6 Dogra Regiment from the Chandel district of Manipur. This has been noted as the largest attack on the Indian Army after the Kargil war of 1999. Cross-LoC surgical strikes 2016 Intelligence gathering had started a few weeks prior, through drones, satellites and various other Indian assets, on 26 September 2016, small recon teams were given the task to infiltrate across the LoC, to carry out a 24 hour surveillance of the targets and to put together the best possible infiltration and exfiltration routes through the heavily mined and manned border in the world, the LoC. The intelligence was so strong that it's reported that the hit squads knew the names of the fidayeens at the launch pads. On return of the recon team, plans were laid down for the assault, and on 29 September 2016, India attacked the strike targeted areas across the Line of Control (LoC), where militants congregate for their final briefings before sneaking across into India. An Indian security source said the operation began with Indian forces firing artillery across the frontier to provide cover for three to four teams of 70–80 para SF commandos from 4 and