Conversation so far:
who was dulce et decorum est written for
The first draft of the poem was dedicated to Jessie Pope, a civilian propagandist of World War I, who encouraged—with such high zest—young men to join the battle.
who wrote the poem Dulce et Decorum est
Dulce et Decorum est is a poem written by Wilfred Owen during World War I.
what was Wilfred Owen's opinion of the First World War
The poem is known for its horrific imagery and condemnation of war.
did Wilfred Owen fight in the First World War
On 21 October 1915, Wilfred Owen enlisted in the Artists Rifles Officers' Training Corps. On 4 June 1916, he was commissioned as a second lieutenant in the Manchester Regiment.

Question: what did he do after World War I
Self-contained rewrite: what did Wilfred Owen do after World War I