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Battle Of Bull Run
It showed both the Union and the Confedederacy that their soldiers needed training. It also showed that the war would be long and bloody. -
Battle Of Chancellorsville
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Battle Of Antietam
It happened in Maryland . General MCdellen won the battle of Antietam. So that Lee's force could return home. -
Battle Of Fredericksburg
It happened in Fredericksburg. The confederate won. So they could win over Richmond.