 As a part of this military expansion, seven mountain divisions were raised to defend India's northern borders against any Chinese attack.Most of these divisions were not based near the border, save for the "Chumbi Valley", where both Indian and Chinese troops are stationed on both sides at close range.Particularly at the Nathu La pass in the valley, alongside the Sikkim-Tibet border, the deployed Chinese and Indian forces are stationed about 20–30 meters apart, which is the closest of anywhere on the 4000  km Sino-Indian border.