 Complete the following phrase:  The UDD suspended most of their political activities throughout the rest of the year, but regathered in March 2010 to call for new elections. The protesters later occupied a large area of Bangkoks central shopping district, blocking off areas from Ratchaprasong Intersection to Lumphini Park. Violent attacks, both against protesters and government units, escalated as the situation dragged on, while negotiations between the government and the protest leaders repeatedly failed. Around mid-May, in an attempt to remove the protesters, military forces performed a 