This battle occurred between the USS Monitor and the CSS Merimack, and neither won the battle:

Battle of Hampton Roads, or popularly known as the Battle of Merrimac v. Monitor.

Explanation:

The Battle of Hampton Roads pitted the ironclads of both the North and South against each other, while the North was naval besieging the ports of the South to keep them from receiving foreign aids and from trading. Neither side technically won, as the Union lost some wooden ships, while the blockade was kept up.

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an era of negotiation.

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