Final answer:
The South was fighting to preserve and extend slavery during the Civil War.
Step-by-step explanation:
The South was fighting to preserve and extend slavery to other states during the Civil War. Slavery was a vital part of the Southern economy, and they feared that if slavery was abolished, it would significantly impact their way of life and economic prosperity. The Confederate states seceded from the Union and formed the Confederacy to protect their interests, including the institution of slavery.
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