In each year 1914-1918 Royal Mail has issued a set of stamps commemorating the centenary of the 1st World War.
One of the stamps each year has featured poetry. In 1918 it was Wilfred Owen’s poetry.
“What passing bells for these who die as cattle?
Only the monstrous anger of the guns”
Anthem for Doomed Youth
In addition there are a large number of special postmarks. One postmark is particularly relevant. It reads Centenary The Great War 1914-1918 Oswestry Shropshire. And within the circle Dulce et Decorum Est.... Pro Patria Mori