“Druk Wangyal Chortens” are memorial stupas built along the road between Thimpu and Punakha at the 3,100-metre-high mountain pass, Dochu La. They were built in 2003-2004 as a memorial to Bhutanese soldiers killed in the December 2003 battle against Assamese insurgents from India who were raiding Assam from their 30 camps on Bhutanese territory.