This passage is meant to invoke a sense of national unity towards a common enemy. Wars are often seen as uniting in the sense that they bring people in a nation together.
No this sentences it has a idiom sentences, because it has the meaning with the simplifying that the meaning a word it is raining really outside. For example for rain metaphors sentences are It's raining cats and dogs. Save it for a raining day. Make it rain with money. It will never rains until it pours.
It will help you.
-Charlie
Have a great day
"<span>Despite what many think of him by the play's conclusion, Macbeth's brave and noble reputation (literally) precedes him in Shakespeare's drama. Before we even come face-to-face with Macbeth, a sergeant returns from a recent battle to directly characterize him: 'For brave Macbeth -well he deserves that name - / Disdaining fortune, with his brandish'd steel, / Which smoked with bloody execution, / Like valour's minion carved out his passage."</span>
