Wilfred Owen's poem 'Dulce et Decorum Est' critiques the glorification of war by illustrating the brutal realities faced by soldiers during World War I. Through vivid imagery, similes, and metaphors, Owen conveys the physical and psychological torment of combat, ultimately challenging the notion that it is sweet and honorable to die for one's country. The poem serves as a powerful anti-war statement, exposing the truth behind the propaganda that romanticized military sacrifice.