Hertz led the first expeditions into the far north of Burma in 1888, was responsible for the 1912 Gazetteer of Kachin Hills area and served as the first Deputy Commissioner of the Government in the Putao District.
Roberts of the 153rd (Gurkha) Indian Parachute Battalion, the men had orders to investigate the state of the Myitkyina area and then march 150 miles north to Fort Hertz.
On 12 August 1942, Major Hopkins of the 50th Indian Parachute Brigade overflew the Fort and discovered that it was unexpectedly in British hands.
With the assistance of Kachin irregulars, the route north from Japanese-held Burma to Fort Hertz was defended against a series of minor attacks in 1942 and 1943.
In 1943 and 1944 the primary purpose of Fort Hertz was to gather intelligence and to cover an airstrip which served as an emergency landing ground for planes flying The Hump from India to China over the eastern end of the Himalayas.
Large-scale official training of the Kachin Levies did not start until August 1943 when a V Force team was sent to Fort Hertz.