Sundarji joined the
British Indian Army in 1945 during the
Second World War, though the war ended before he could see any active service. On 28 April 1946, he was given an emergency commission as a
second lieutenant in the
Mahar Regiment. Sundarji was promoted to
major general on 26 July 1974. For the first time in the history of the Indian Army, an infantry officer became the
general officer commanding of the elite
1st Armoured Division. He was chosen by General
K. V. Krishna Rao to be part of a small team for reorganising the Indian Army, especially with regard to technology. He raised the
Mechanised Infantry Regiment by amalgamating various battalions from the army's premier infantry regiments.
Operation Blue Star He was promoted to
lieutenant general on 5 February 1979. In 1984, he led
Operation Blue Star, intended to evict extremists who had occupied the
Golden Temple in
Amritsar. He later said "We went inside with humility in our hearts and prayers on our lips". According to his wife, Sundarji emerged a changed man after this operation.
Chief of Army Staff In 1986, he was promoted to
general and appointed
Chief of the Army Staff (COAS). After taking over as COAS, he wrote a letter to his soldiers warning of deteriorating standards, and the evil of
sycophancy. His operation at
Sumdorong Chu in 1986, known as
Operation Falcon, was widely praised. The Chinese had occupied Sumdorong Chu, and Sundarji used the
Indian Air Force's new airlift capability to land a brigade in
Zimithang, north of
Tawang. Indian forces took up positions on the Hathung La ridge, across the
Namka Chu river, where India had faced a humiliating defeat in 1962. The Chinese responded with a counter-build-up and adopted a belligerent tone. Western diplomats predicted war, and some of Prime Minister
Rajiv Gandhi's advisers blamed Sundarji's recklessness. But Sundarji stood by his steps, at one point telling a senior aide, "Please make alternate arrangements if you think you are not getting adequate professional advice." The confrontation petered out. He was also involved in
Operation Brasstacks, a large-scale mechanised artillery and war gaming effort in July 1986 near the Pakistan border, which led to similar Pakistani buildup. The situation was defused through diplomatic talks in February 1987.
Operation Pawan In 1987, the Indian government forced Sri Lankan president to accept a ceasefire agreement with LTTE and the
Indian Peace Keeping Force was sent to
Jaffna to disarm the
Liberation Tigers of Tamil Eelam (LTTE). However, the Indian Army had no experience in unconventional jungle warfare and took heavy casualties. Among the few successes was the bombing of the LTTE controlled
jetties by the Indian Navy Marine Commandos, then known as the Indian Navy Special Commando Force. The
Indian Peace Keeping Force force was withdrawn in 1990. ==Nuclear policy==