In Dulce et Decorum Est, hags is used to describe young soldiers. The simile 'coughing like hags' was used because the young soldiers went into battle strong and full of life. After battle, they returned looking aged and beat down - hence 'hags' or resembling beggars.
Dramatic irony occurs when the audience knows something that the characters don’t.
Answer: He was eighteen feet from nose to tail
Explanation:
Following the victory at Troy, he and his men sail to Ismarus, the stronghold of the Cicones. With apparent ease, they sack the city, kill the men, enslave the women, and enjoy a rich haul of plunder. Odysseus advises his men to leave immediately with their riches, but they ignore his warnings.
Hope this helps :)