Pressure grew on Myanmar today as a rights group urged world leaders to impose sanctions on its military, which is accused of driving out more than four lakh Rohingya Muslims in an orchestrated ethnic cleansing campaign. <br/><br/>The call from Human Rights Watch came as the UN General Assembly prepared to convene in New York, with the crisis in Myanmar one of the most pressing topics. <br/><br/>It also came on the eve of a highly-anticipated national address by Myanmar's civilian leader Aung San Suu Kyi, her first on the Rakhine crisis.<br/><br/>UN Secretary General Antonio Guterres called Suu Kyi's upcoming address a last chance to stop the unfolding humanitarian calamity.