Dehradun most populous city in the state of Uttarakhand. Dehradun. The state of Uttarakhand given highest number of soldiers to the Indian army in which we can assume that Dehradun has contributed the most. Some of the oldest regiments are situated in Uttarakhand. Lansdowne Cantonment is the command office of venerated Garhwal Rifles while cantonment at NDA Foundation Coaching In Dehradun , Ranikhet is home to Kumaon Regiment and Naga Regiment. Other cantonments in Uttarakhand are situated at Landour, Dehradun, Chakrata and Roorkee. Dehradun is a notable academic and research hub and is home to Indian Military Academy, Rashtriya Indian Military College. IMA Dehradun