There's a misunderstanding here. In World War 1 the soldiers wrote letters to their families and friends. Even poets wrote letters. It is not the case that 'soldiers [wrote] poetry instead of letters. A small number of World War 1 poets became well known.
Soldiers in World War I often turned to poetry as a way to express the intense emotions and experiences they were facing on the front lines. Poetry allowed them to delve deeper into their thoughts and feelings, capturing the Horror and complexity of war in ways that traditional letters could not convey. It became a powerful form of creative expression amidst the chaos and devastation of the war.
WW1 soldiers sent letters by a pigeon or dogs but they did also have trench post box
letters
They wrote letters.
trenchwarfare?
every time they pooped
use ask.com instead
Marguerite Harris has written: 'Loves, etc' -- subject(s): American Love poetry 'Emily Dickinson: letters from the world' -- subject(s): American poetry, Poetry, Women poets
Susanne Christine Puissant has written: 'Irony and the poetry of the First World War' -- subject(s): English War poetry, English poetry, History and criticism, Irony in literature, Literature and the war, Soldiers' writings, English, War poetry, English, World War, 1914-1918
Sydney Kessler has written: 'That which was once a war' -- subject(s): American War poetry, Ardennes, Battle of the, 1944-1945, Poetry, Soldiers, War poetry, American, World War, 1939-1945
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Catherine W. Reilly has written: 'English poetry of the First World War' -- subject(s): Bibliography, World War, 1914-1918, English poetry, War poetry, English, Poetry, Literature and the war, English War poetry 'Late Victorian poetry, 1880-1899' -- subject(s): Dictionaries, Poets, English, English poetry, Biography, Bio-bibliography, English Poets 'English poetry of the Second World War' -- subject(s): Bio-bibliography, Dictionaries, Biography, English poetry, World War, 1939-1945, Poets, English, Bibliography, Poetry, Commonwealth poetry (English), War poetry, English, Soldiers, Soldiers' writings, English, Literature and the war, English Poets, English War poetry 'Mid-Victorian poetry, 1860-1879' -- subject(s): Bio-bibliography, Biography, Dictionaries, English Poets, English poetry, Poets, English, Bibliographie, Gedichten, Victoriaanse tijd, Geschichte 1860-1879, Engels, Lyrik
Ted Hughes did not write poetry specifically about World War 1 Ypres. His poetry often dealt with themes of nature, mythology, and the human experience, but did not focus on specific historical events like the battles of World War 1.