The Battle of Chalai was an armed confrontation over control of Chalai, Sri Lanka between the 55 Division of the Sri Lankan Military and the Liberation Tigers of Tamil Eelam (LTTE) during the Sri Lankan civil war, fought in February 2009. Chalai was the final Sea Tiger base held by the LTTE during the Northern Theater of Eelam War IV. Fighting lasted for five days, following which the 55 Division took control of the area.