An advance party of the 6010th Tactical Group, USAF, arrived at Don Muang at the request of the Royal Thai government to establish an aircraft warning system.[1] Six F-100s from the 510TFS/405FW based at Clark Air Base were deployed to Don Muang in operation "Bell Tone".[2]
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Four RF-101C reconnaissance aircraft of the 45th Tactical Reconnaissance Squadron stationed at Misawa AB, Japan, and their photo lab arrived at Don Muang under "Operation Able Marble". The RF-101s were sent to assist RTAF RT-33 aircraft in performing aerial reconnaissance flights over Laos.[1]: 75 Detachment 10, 13th Air Force was established to support USAF operations.[1]: 279