The National Union of Ex-Servicemen (NUX) was a socialist ex-servicemen's organisation founded in London in early 1919 with close links with the Labour Party. Many of its members were formerly supporters of the National Federation of Discharged and Demobilized Sailors and Soldiers and the Soldiers, Sailors and Airmen's Union (SSAU). Within six months it had grown from one branch with fifty members to over one hundred branches and claimed a membership of nearly 100,000. Its membership was boosted by the stance of the Federation against the 1919 United Kingdom railway strike in the autumn of that year: it called on Prime Minister David Lloyd George to "hold firm against Labour tyranny", causing tension in its ranks and prompting many left-wing members to leave and join NUX, which had support