U.S. Secretary Rex Tillerson arrived in Bangkok today and met his Thai Counterpart Don Pramudwinai for a bilateral meeting.

Tillerson is the most senior U.S. Official to visit Thailand since a 2014 coup, when the U.S. Downgraded diplomatic and military ties with Bangkok, Washington’s oldest ally in the region.

A spokeswoman for the State Department’s East Asia Bureau said Tillerson will discuss a broad range of issues including security, trade and investment. His visit follows his attendance at a regional forum in manila at the weekend.