Who one of the leading poets of the First World War, who was the first known user of the phrase  "the pity of war" ?
The Pity of War The first known use of the phrase "the pity of war" was by Wilfred Owen in 1918, in the preface to his collected poems, which would be posthumously published. The phrase, has been used as a title of books and other media over a long period.
Émile Deschamps Émile de Saint-Amand Deschamps (] ; 20 February 179123 April 1871) was a French poet. He was born at Bourges. The son of a civil servant, he adopted his father’s career, but as early as 1812 he distinguished himself by an ode, "La Paix conquise", which won the praise of Napoleon. In 1818 he collaborated with Henri de Latouche in two verse comedies, "Selmours de Florian" and "Le Tour de faveur".