The Poem’ Strange Meeting’ is written as an elegy: traditionally a form used to lament or mourn the dead. Owen is mourning the death of the narrator, curiously a poet who we take to be Owen himself, and a soldier with whom he died in battle who identifies himself:
I am the enemy you killed, my friend
This use of antithesis and contrast occurs throughout the poem to highlight the opposites of life and death, war and peace, friend and enemy. The effect is to draw attention to the cruel ambiguities and senseless contradictions of war.