Indian Army The basic responsibility of the Army is to safeguard the territorial integrity of the nation against external aggression. Due to the country’s long borders encompassing different geographical and climatic conditions such as desert terrain on the west, snow-covered mountains in the north and thick rainfed mountainous jungles in the east, the Army has to constantly prepare itself for diverse challenges. In addition, the Army is often required to assist the civil administration during internal security disturbances and in the maintenance of law and order, in organising relief operations during natural calamities like floods, earthquakes and cyclones and in the maintenance of essential services. Demands on the Army have increased manifold due to continuous deployment of its forces in intense counter insurgency operations in Jammu & Kashmir and the North East parts of the country. To achieve these objectives, the Army has to be constantly modernised, suitably structured, equipped and trained. The Indian Army is organised into five regional commands HQ Central Command, Lucknow; HQ Eastern Command, Calcutta; HQ Northern Command, Udhampur; HQ Western Command, Chandimandir; and HQ Southern Command, Pune. HQ, South Western Command, Jaipur HQ, Army Training Command, Shimla The Indian Army is divided into the following two broad categories: Arms and Services.