People's Alliance for Democracy (PAD) on Thursday rally in front of the 11th Infantry Regiment in Bangkok and submitted a letter, urging the government to solve the country's political crisis as soon as possible.
However PAD, known as yellow shirts, would not set deadline to pressure the government.
The PAD was led by Chamlong Srimuang and Pipob Thongchai arrived the site at 10am. They submitted the leter to Prime Minister Abhisit Vejjajiva and army chief Gen Anupong Paochinda via government spokesman Panitan Wattanayagorn and Maj Gen Jiradej Sitthipraneet, secretary of the Royal Thai Army.
Gen Chamlong told the crowd who gathered there that soldiers are duty-bound to protect the country and should not let any law violator to destroy the nation.
He said the law must be strictly enforced and adhered and there will be more casualties if the government does not more quickly tackle the ongoing problem.
PAD coordinator Suriyasai Katasila said after the group's letter was submitted that the PAD urged the government to take legal action against terrorists who mingled with the red shirt protesters and bring normalcy back to the country as soon as possible.
Suriyasai said the PAD will not pressure the government or the army by giving the deadlines, saying the group believes that both the government and the army will adhere to the law.
The PAD coordinator also reaffirmed the yellow-clad will not mobilise it supporters to confront with the reds.
PAD supporters in Chiang Mai, Khon Kaen and Phuket also gathered at army unites in their provinces to submit the group's letters.