Rupert Brooke was famous for writing what during the First World War?

Rupert Chawner Brooke ( 3 August 1887 – 23 April 1915) was an English poet known for his idealistic war sonnets written during the First World War, especially "The Soldier". He was also known for his boyish good looks, which were said to have prompted the Irish poet W. B. Yeats to describe him as "the handsomest young man in England”.

Brooke enlisted at the outbreak of war in August 1914. He came to public attention as a war poet early the following year, when The Times Literary Supplement published two sonnets ("IV: The Dead" and "V: The Soldier") on 11 March; the latter was then read from the pulpit of St Paul's Cathedral on Easter Sunday (4 April). Brooke's most famous collection of poetry, containing all five sonnets, 1914 & Other Poems, was first published in May 1915 and, in testament to his popularity, ran to 11 further impressions that year and by June 1918 had reached its 24th impression; a process undoubtedly fuelled through posthumous interest.