How did Britain's withdrawal of troops from the BNA, the Fenian raids, and the American Civil War encouraged BNA to think about creating a single country?

British North America decided to create a single country because they needed independence and strength. After America beat off the British, the soldiers went unpaid and the soldiers homes were foreclosed. They rioted and destroyed court houses. A strong Govt. was needed to keep America together.

Explanation:

c) troops march forward in close formation against newer, more accurate weapons

the treaty of brest-litovsk was a peace treaty signed on 3 march 1918 between the new bolshevik government of russia and the central powers (german empire, austria-hungary, bulgaria, and the ottoman empire), that ended russia's participation in world war i.