Eastern neighbor Vietnam now exerts much political power within, for 10 points, what Southeast Asian nation with capital at Vientiane?
Cities here include Ban Nape and Salavan, and Phu Bia is its highest point. It can trace its history back to the "Land of a Million Elephants", or Lan Xang, which reigned here from the thirteenth to eighteenth centuries. The Buddhist-temple-filled UNESCO World Heritage site of Luang Prabang can be found in this nation, while big stone containers populate its famous Plain of Jars in the north, and its western border with Thailand is mostly created by the Mekong River. Eastern neighbor Vietnam now exerts much political power within, for 10 points, what Southeast Asian nation with capital at Vientiane?
Cities here include Ban Nape and Salavan, and Phu Bia is its highest point.
{Laos}