What prevented the north from obtaining an immediate victory in the civil war?

He achieved international fame as the leading Union general in the American Civil War. Fort Henry was Grant's first military success. ... This was battle fought by Grant in an attempt to capture the railroad of the South. The battle was fought in the west prevented the north from obtaining an easy victory.

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the answer is actually b.   as habitats are destroyed, animals and plants may become extinct.   , according to edge nuity

answer; /// i believe the correct answer is (oasis)