The Battle of Chatkol (also known as the 55 Nights of Chatkol) was the name given to the series of skirmishes between United Nations Command (UN) and Chinese People's Volunteer Army (PVA) forces near the village of Chatkol at the centre of the Iron Triangle during the Korean War. The position was held by the Belgian UN contingent for 55 consecutive nights, during which time they came under heavy attack.