
Wilfred Owen mounts a powerful argument against the complacency of those who believe war to be a glorious patriotic duty.

Storm troops advancing in battle
The opening of the poem suggests Owen pities the state to which the soldiers have fallen. Instead of youthful, strong fighters they are 'Bent double', 'Knock-kneed, coughing like hags'. Owen's imagery presents the men as prematurely old and weakened. War has broken these men, and they are described in the most unglamorous, inglorious manner. Owen's bitterness at this transformation is obvious.
Owen's disillusionment with war is also clear from the closing lines of the poem. After describing the horrifying effects of the gas attack he addresses the reader:
'My friend, you would not tell with such high zest To children ardent for some desperate glory, The old Lie'
He is rejecting the accepted attitude back at home that serving your country in war is glorious. He is critical of the 'high zest', or great enthusiasm, used to convince men to go to war. He sees war as brutal and wasteful of young lives. His choice of the word 'children' is also significant; impressionable young men are almost lured to war by the promise of 'desperate glory'.