According to
Rejaul Karim Laskar, a scholar of Indian foreign policy,
Indian intervention in Sri Lankan civil war became inevitable as that civil war threatened India's "unity, national interest and territorial integrity." According to Laskar, this threat came in two ways: On the one hand external powers could take advantage of the situation to establish their base in Sri Lanka thus posing a threat to India, on the other hand, the LTTE's dream of a sovereign Tamil Eelam comprising all the Tamil-inhabited areas (of Sri Lanka and India) posed a threat to India's territorial integrity. and later under
Rajiv Gandhi, provided support to Tamil interests from the very conception of the secessionist movement. This included providing sanctuary to the separatists, as well as support the operations training camps for Tamil guerrillas in
Tamil Nadu of which the LTTE emerged as the strongest force. This was both as a result of a large Tamil community in
South India, as well as India's regional security and interests which attempted to reduce the scope of foreign intervention, especially those linked to the United States, Pakistan, and China. In 1986, the campaign against the insurgency was stepped up and in 1987,
Operation Liberation was launched against LTTE strongholds in Jaffna Peninsula, involving nearly four thousand troops, supported by
helicopter gunships as well as
ground attack aircraft. As civilian casualties grew, calls grew within India to intervene in what was increasingly seen in the Indian (and Tamil) media as a developing humanitarian crisis, especially with reports of the use of aerial attacks against rebel positions in predominantly civilian areas. but this was intercepted by the Sri Lankan Navy and turned back. Following the failure of the naval mission, the decision was made by the Indian government to mount an airdrop of relief supplies in support of rebel forces over the besieged city of Jaffna and the rebel occupied
Jaffna Fort. On 4 June 1987, in a blatant show of force, the
Indian Air Force mounted
Operation Poomalai in broad daylight. Five
An-32s of the Indian Air Force under cover of heavily armed Indian fighter jets flew over Jaffna to airdrop 25 tons of supplies, all the time keeping well within the range of Sri Lankan radar coverage. At the same time the Sri Lankan Ambassador to New Delhi was summoned to the Foreign Office to be informed by the
Minister of External Affairs,
K. Natwar Singh, of the ongoing operation. It was also indicated to the ambassador that if the operation was in any way hindered by Sri Lanka, India would launch a full-force military retaliation against Sri Lanka. The ultimate aim of the operation was both to demonstrate the credibility of the Indian option of active intervention to the Sri Lankan Government, as a symbolic act of support for the Tamil Rebels, as well to preserve
Rajiv Gandhi's credibility. Faced with the possibility of an active Indian intervention and facing an increasingly war-weary population at home, the Sri Lankan President,
J. R. Jayewardene, offered to hold talks with the
Rajiv Gandhi government on future moves. that brought a temporary truce. ==Peace accord==