Question

independent practice
as the civil war began, each side possessed certain strengths. match the strength to the side it belongs to.
well-organized navy
union
confederacy

Explanation:

At the start of the U.S. Civil War, the Union had a pre-existing, well-developed naval force, while the Confederacy had to build its navy from scratch and never matched the Union's naval organization and size.

Answer:

well-organized navy → Union