Washington - The United States voiced confidence Tuesday that Thailand's military will not stage another coup as worries mount in Washington of prolonged turmoil in its oldest Asian ally.
"At this point we don't have any reason to expect that the Thai military will change their current stance," she told a conference in Washington.
Searight said that the Thai military appeared to have learned lessons from 2006, when it overthrew tycoon Thaksin Shinawatra as prime minister and the United States briefly imposed sanctions.
Thailand's judiciary last week removed Prime Minister Yingluck Shinawatra -- Thaksin's sister -- in the latest twist in the deeply polarized nation's eight years of turmoil that has involved crippling street protests and occasional bloodshed.
Scot Marciel, the top State Department official on Southeast Asia, said that Washington was not offering a "US prescription" to resolve the crisis beyond urging a peaceful solution.
"It's important that it be done constitutionally and democratically and, of course, peacefully," Marciel said.
Behind the chaos, many observers believe that Thailand is undergoing a struggle on who will lead the country after the six-decade reign of 86-year-old King Bhumibol Adulyadej. The world's longest-serving monarch is widely revered as a father figure but has been ill for several years.
Ernie Bower, the Southeast Asia chair at the Center for Strategic and International Studies which held the conference, said that Thailand is undergoing "an existential 100-year power struggle."
Bower added that the United States should remain steadfast in advocating democracy and human rights even if it faces short-term worries of losing ground to regional power China, which pleased the Thai military by swiftly accepting the 2006 coup.
"I think in the long run if we stick with those principles, we will find ourselves on the right side of history in Thailand, with the Thai people," Bower said.
A 'drag' to region
The crisis comes as US President Barack Obama pursues a "pivot" strategy of putting a greater focus on Asia in the face of concerns by several nations over China's rise.
Thailand was the first Asian ally of the United States, with the kingdom -- then known as Siam -- signing a friendship treaty with Washington in 1833 and famously offering elephants to president Abraham Lincoln to fight the Civil War.
Marciel and Searight both said that US cooperation with Thailand had largely progressed unhindered, with the exception of some work by government ministries closed by street protests. Cobra Gold -- the region's largest war exercises, which take place in Thailand among US-friendly nations -- went ahead in February.
But Vikram Singh, a key force behind the "pivot" who recently left the Pentagon and joined the Center for American Progress think tank, said that an intensified crisis would hurt the region as a whole even if Thailand and the United States succeed in preserving cooperation.
"If Thailand falters, I think it is going to be a powerful drag on the progress for Southeast Asia as a whole," he said.