Okay so i found the answer on Answers.com so this is just a guess, but here it is. "<span>A poster with kitchener pointing on it saying "The army needs you".</span>
Answer:
Christ's birth - poet's time - Christ's birth
Explanation:
Enjambment - the sentences do not finish with the end of the line.
Simile - "like a slackened drum"
Maybe even hyperbole, since it is an exaggeration.