In 1943, General Merrill was appointed to command a new volunteer U.S. Army special forces unit patterned after the Long Range Jungle Penetration groups formed by the British to harass Japanese forces in Burma (the Chindits).
On August 10, 1944, a week after the town's fall to U.S. and Chinese forces, the 5307th was disbanded with a final total of only 130 combat-effective officers and men (out of the original 2,997).