Answer:
A. Blitzkrieg
Explanation:
This infamous tactic had been used in the early stages of the German War Effort. It had been first used in Poland and France which shocked the global community due to its intense speed of invasion.
Reference:
Blitz: Lighting Krieg: War
The tactic was originally called The War of Movement.
Answer:
To save the union
Explanation:
President Lincoln told a New York newspaper that preserving the Union was his main goal of the Civil War — not abolishing slavery.