The British Nepalese Army Annapurna Expedition 1970
This expedition, a joint venture of the Army Mountaineering Association and the Nepalese Army, with representative of the British Army, the Gurkha Rifles, the Nepalese Army and the Royal Air Force, succeeded in making the second ascent of Annapurna, following on from the first ascent by a French team in 1950. Captain Henry Day and Major Gerry Ownes reached the summit on 20 May, a few days ahead of the Annapurna South Face Expedition.
The expedition also conducted research in high altitude medicine and bird migration.