Wilfred Edward Salter Owen was born 18 March 1893 in Oswestry, Shropshire. After school he became a teaching assistant and in 1913 went to France for two years to work as a language tutor. He began writing poetry as a teenager.
In 1915 he returned to England to enlist in the army and was commissioned into the Manchester Regiment. After spending the remainder of the year training in England, he left for the western front early in January 1917. After experiencing heavy fighting, he was diagnosed with shellshock. He was evacuated to England and arrived at Craiglockhart War Hospital near Edinburgh in June. There he met the poet Siegfried Sassoon, who already had a reputation as a poet and shared Owen's views. Sassoon agreed to look over Owen's poems and gave him encouragement.
Reading Sassoon's poems and discussing his work with Sassoon revolutionised Owen's style and his conception of poetry. He returned to France in August 1918 and in October was awarded the Military Cross for bravery. On 4 November 1918 he was killed while attempting to lead his men across the Sambre canal at Ors, France. The news of his death reached his parents on 11 November, Armistice Day.
Edited by Sassoon and published in 1920, Owen's single volume of poems contain some of the most heartbreaking English poetry of World War I, including "Dulce et Decorum Est" and "Anthem for Doomed Youth".
Here you can find a detailed analysis of the poem "Dulce et Decorum Est".