burma (myanmar) is the largest producer of methamphetamine in the world, with the majority of ya ba found in thailand being produced in burma, particularly in the golden triangle and northeastern shan state, which borders thailand, laos, and china. in 2010, burma trafficked 1 billion tablets to neighbouring thailand. ethnic militias and rebel groups (in particular the united wa state army) are responsible for much of this production; however, the burmese military units are believed to be heavily involved in the trafficking of the drugs.