sentences:  Rajasinha's hold over his own population was tenuous, and rebellions against him in 1664 and 1671 gave the Dutch the opportunity to seize large parts of Sabaragamuwa in 1665, as well as Kalpitiya, Kottiyar, Batticaloa and Trincomalee.The seizure of the ports was a serious blow to the Kandyan kingdom – not only were Dutch holdings now more or less coterminous with the territory the Portuguese had held, but all Kandyan trade was now in Dutch hands.Rajasinha attempted to negotiate an alliance with France, who seized Trincomalee, but were expelled by the Dutch in 1672.