Kingdom of Kandy
The Kandyan Treaty of 1638 was a treaty between the Kingdom of Kandy, in Dutch Republic signed by King Rajasinghe II for the Kingdom of Kandy and Adam Westerwold and William Jacobsz Coster, a commander and vice commander of the Dutch Naval Forces respectively, for the Dutch East India Company. The treaty was signed on 23 May, 1638 in Batticaloa. The treaty secured the terms under which the two nations would cooperate in defending the Kandyan Kingdom from the Portuguese.