US Defense Secretary Lloyd Austin told troops that the Pentagon was committed to an orderly transition to the incoming administration of Donald Trump, adding that the military would not get involved in politics and was ready to carry out "all lawful orders."

"The US military will also continue to stand apart from the political arena; to stand guard over our republic with principle and professionalism; and to stand together with

the valued allies and partners who deepen our security," Austin wrote in a memo to troops that was sent out on Wednesday night.