American WW1 propaganda poster regarding rationing: this poster told the Americans to barely use any sugar and that they were only allowed to use the tiny portions because it was needed for other things.
This poem. I love it. "Dulce Et Decorum Est" ('it is sweet and right'), 1917, by Wilfred Owen (1893-1918) ─ The poem is meant as a condemnation of war. In November 1918 Owen was killed in action at the age of twenty-five, one week before the Armistice.