By the time of the
1964 coup, the Patriotic Neutralists had been largely absorbed into the Pathet Lao, although the two sides held the first of its biannual cooperative mock political congresses in 1964. On the Plain of Jars, the coup sparked further dissension in the Neutralist movement. Two of FAN's paratroop battalions—BP 4 and BP 6—favored siding with the communists. On 27 April 1964, as the Royalist garrison withdrew from Phou San, it was attacked and defeated by communist forces as nearby FAN units deigned to intervene. However, when Pathet Lao occupied the vacated strongpoint overlooking Kong Le's headquarters at Muong Phan, his
Bataillon Parachutistes 5 unsuccessfully assaulted the mountaintop. Six days later, the third mountaintop position, on Phou Nong, also fell. The defeated troops split into two columns escaping in opposite directions, with the Royalists retreating southeast while FAN withdrew to the northwest. The American
Special National Intelligence Estimate of 5 August 1965 credited the Patriotic Neutralists as an ineffectual force of 2,600 men. The Patriotic Neutralists established their headquarters within a known no-strike zone so that it could not be bombed by air strikes. The
rules of engagement followed by the American forces within the
Kingdom of Laos posited a 16 kilometer wide sanctuary along the border of the
Democratic Republic of Vietnam to avoid inadvertent attacks on the DRV. However, in October 1969, the American ambassador changed the rules of engagement; the protected border area was cut to eight kilometers. The Patriotic Neutralist headquarters lay in the newly exposed zone. At 0600 hours on 13 October 1969, one of the
Raven FACs flying a
T-28 Trojan directed a pair of
F-4 Phantoms in a devastating raid on the headquarters. All of Deuane's subordinate officers were killed; however, he was in the DRV at the time. As the communists gained power toward the end of the
Laotian Civil War, the Patriotic Neutralist front was still recognized as a separate organization. Some of its leaders were appointed to positions in the communist-dominated Provisional Government of National Union. Deuane Sunnalath was appointed as Deputy Minister for Education on 9 April 1974. That same day, Khamouane Boupha was named as Deputy Minister of Defense. ==Notes==