General Hastings Lionel Ismay, 1st Baron Ismay KG GCB CH DSO PC DL (21 June 1887 17 December 1965), nicknamed Pug, was a British Indian Army officer and diplomat, remembered primarily for his role as Winston Churchill's chief military assistant during the Second World War and his service as the first Secretary General of NATO from 1952 to 1957.Ismay was born in Nainital, India in 1887, and educated in the United Kingdom at the Charterhouse School and Royal Military College, Sandhurst. After Sandhurst, he joined the Indian Army as an officer of the 21st Prince Albert Victor's Own Cavalry. During the First World War, he served with the Camel Corps in British Somaliland, where he joined in the British fight against the Mad Mullah , Mohammed Abdullah Hassan. In 1925, Ismay became an Assistant Secretary of the Committee of Imperial Defence. After being promoted to the rank of colonel, he served as the military secretary for Lord Willingdon, the Viceroy of India, then returned to the Committee of Imperial Defence as Deputy Secretary in 1936.On 1 August 1938, shortly before the outbreak of the Second World War, Ismay became the Secretary of the Committee of Imperial Defence and began planning for the impending war. In May 1940, when Winston Churchill became Prime Minister of the United Kingdom, he selected Ismay as his chief military assistant and staff officer. In that capacity, Ismay served as the principal link between Churchill and the Chiefs of Staff Committee. Ismay also accompanied Churchill to many of the Allied war conferences. For Ismay's advice and aid, Churchill owed more, and admitted that he owed more to him than to anybody else, military or civilian, in the whole of the war. After the end of the war, Ismay remained in the army for another year, and helped to reorganise the Ministry of Defence. He then retired from the military and served as Lord Mountbatten of Burma's Chief of Staff in India, helping to oversee its partition. From 1948 to 1951, he served as chairman of the council of the Festival of Britain, helping to organise and promote the event. Then, in 1951, when Churchill again became Prime Minister, he appointed Ismay Secretary of State for Commonwealth Relations. Ismay accepted the position, but resigned after only six months to become the first Secretary General of NATO in 1952. He served as Secretary General until 1957, and helped to establish and define the position. After retiring from NATO, Ismay wrote his memoirs, The Memoirs of General Lord Ismay, served on a variety of corporate boards, and co-chaired the IsmayJacob Committee, which reorganised the Ministry of Defence once again. He died on 17 December 1965, at his home Wormington Grange, Gloucestershire.