The Sri Lankan civil war was between the Tamil minority and the Sinhalese majority government and was aided by India
Explanation:
The conflict between the Sri Lankan minority of Hindu Tamils and the majority of Buddhist Sinhalese in the northern region of Sir Lanka was one of the man conflicts of the region of south Asia.
It had escalated into a full blown civil war with organisations like LTTe leading the front in the war for the Tamils.
As India had a large Tamil population too they had popular support in India and thus India was aiding the Tamils and when they intervened in the war then also they were a little on their side.