Thailand government under pressure as thousands march in protest Chanting "Thaksin get out, army come in," some of the demonstrators called for the intervention of the military in a country that has seen 18 actual or attempted coups since it became a constitutional monarchy in 1932. High ranking military officers emerged from army offices close to the capital's Democracy Monument to accept a bouquet of roses from protesters, as police with riot shields and helmets stood by. The move comes after a boisterous rally on Sunday brought more than 90,000 anti-government demonstrators on to the streets of Bangkok, according to police estimates. Organisers said the turnout was several times higher. Around 50,000 pro-government "Red Shirts" met overnight in a suburban football stadium in Bangkok in support of Yingluck and her brother Thaksin, who remains a hugely divisive figure in Thailand. The rallies are the biggest challenge yet for Yingluck, who swept to power in elections in 2011 on a wave of support from pro-Thaksin "Red Shirts," whose protests in 2010 were crushed by the previous government. Yingluck's options are very limited. Something has to give this week. It will be very difficult for Yingluck to stay in office, let alone get anything done," said Thitinan Pongsudhirak, director of the Institute of Security and International Studies at Bangkok's Chulalongkorn University. "Anti-government protesters are demanding the wholesale uprooting of the Thaksin regime," he told AFP. The Thai capital has faced weeks of opposition-backed rallies sparked by an amnesty bill that could have allowed the return of Thaksin from self-imposed exile. The amnesty bill - which was rejected by the upper house of parliament - also angered Thaksin's supporters because it would have pardoned those responsible for the 2010 military crackdown on their rallies. Former premier Abhisit Vejjajiva - now the opposition leader - and his deputy Suthep face murder charges for overseeing the military operation, which involved soldiers firing live rounds and backed by armoured vehicles. In another blow to the government, the Constitutional Court last week blocked the ruling party's plans for a fully elected Senate. The opposition Democrat Party is seeking to raise the pressure on Yingluck with a no-confidence debate on Tuesday - although her party dominates the lower house and should comfortably defeat a move against her. Thaksin, a billionaire telecoms tycoon-turned-politician, draws strong support from many of the country's rural and urban working class, but is loathed by the elite and the middle classes, who accuse him of being corrupt and a threat to the monarchy. A series of protests by the royalist "Yellow Shirts" helped to trigger the coup that toppled Thaksin, who now lives in self-imposed exile in Dubai to avoid a prison term for corruption that he contends was politically motivated. King Bhumibol Adulyadej, 85, is widely revered in Thailand but has been in ill health for several years and the palace has been silent over the organisation of his eventual succession.