In the context of Wilfred Owen's poem, "Dulce et Decorum Est," which satirically explores the realities and horrors of war, the phrase serves to question and challenge the popular glorification of war and the idea of a "glorious death" for one's country. Owen's poem depicts the brutal realities of war, emphasizing the suffering, gas attacks, and the true nature of dying on the battlefield, thus undermining the patriotic sentiment expressed by the phrase.