Military history is often considered to be the history of all conflicts, not just the history of the state militaries. It differs somewhat from the history of war, with military history focusing on the people and institutions of war-making, while the history of war focuses on the evolution of war itself in the face of changing technology, governments, and geography.
Leading war poets included Siegfried Sassoon, Wilfred Owen, John McCrae, Rupert Brooke, Isaac Rosenberg, and David Jones. A similar movement occurred in literature, producing a slew of novels on both sides of the Atlantic, including notably: All Quiet on the Western Front, and Johnny Got His Gun. The 1963 English stage musical Oh, What a Lovely War! provided a satirical take on World War I, which was released in a cinematic version directed by Richard Attenborough in 1969.