Final answer:
The Union's key strategy for victory in the Civil War was sending large forces to attack both Georgia and Virginia simultaneously.
Step-by-step explanation:
To secure victory in the Civil War, a key strategy employed by the Union was sending large forces to attack both Georgia and Virginia at the same time. This was known as the Anaconda Plan, which aimed to control the Mississippi River and isolate the Confederate forces. By simultaneously attacking these two crucial Confederate strongholds, the Union weakened their opponent and gained a significant advantage in the war.
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