BANGKOK—Burma (also known as Myanmar)’s ousted leader Aung San Suu Kyi went on trial Monday on charges that many observers say are an attempt by the junta that deposed her to eliminate her as a political force, erase the country’s democratic gains and cement the military’s power. Suu Kyi’s prosecution poses yet another major setback for Burma, which had been making slow progress toward democracy when a February coup prevented elected lawmakers from her National League for Democracy party from taking office following last year’s landslide victory. Human Rights Watch said that the allegations being heard in a special court in the capital, Naypyitaw, are “bogus and politically motivated” with the intention of nullifying the victory and preventing Suu Kyi from running for office again. “This trial is clearly the opening salvo in an overall strategy to neuter Suu Kyi and the National League for Democracy party as a force …