At the beginning the 19th century , and ignoring the worldwide agricultural disaster accompanying the 1816 Year Without a Summer , Bassac was said to be on a prosperous trade route as the outlet for cardamon , rubber , wax , resin , skins , horns , and slaves from the east bank to Ubon , Khorat , and Bangkok . The region then fell victim to Siamese and French struggles to extend suzerainty
Year Without a Summer
Year Without a Summer
Kingdom of Champasak