President Abraham Lincoln, in his second inaugural address in 1865 towards the end of the American Civil War, famously called for good treatment of veterans: "o care for him who shall have borne the battle, and for his widow, and his orphan". The American Civil War produced veterans' organizations, such as the Grand Army of the Republic and United Confederate Veterans. The treatment of veterans changed after the First World War. In the years following, discontented veterans became a source of instability. They could quickly organize, had links to the army and often had arms themselves. The Bonus Army of unemployed veterans was one of the most important protest movements of the Great Depression, marching on Washington, D.C. to get a claimed bonus now that Congress had promised them decades in the future.