In Act 4, Scene 2 of the play, a messenger warns Macbeth to leave the place because she, together with her son is in danger of murder. But she protests and argues for she's done nothing wrong. Then a group of murders enters the scene and stabs his son for calling the murderer a liar.
B. to express reverence for the lost soldiers.
Reverence means ‘high esteem’; the speech not only focuses on them and their bravery, but emphasises on the extent of impact that they made, and how brave they were in such conditions.
He was saying that despite being a famous Army Officer, General Corrigan was a man who never forgot where he came or the people he grew up with. Despite his honors and rank, he was still same kid the narrator knew from many years ago. That fact that he greeted him with such enthusiasm tells a lot about the man behind the rank.
