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They feared the new acquired territories would undermine the delicate balance between slave and non-slave states. They tried to ban slavery on the new territories by introducing the Wilmot Proviso (1846). However, many of these territories were already pro-slavery, including New Mexico and Texas. This unresolved issue was one of the main reasons of the American Civil War (1861-1865).

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Gillian Watsica

Lvl 13
3y ago

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