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15 slave states and 19 free states during the American Civil War
The Potomac divided the Confederacy from the Union, although Maryland was a slave-state, and so was DC at the beginning. The Ohio River divided the slave-states from free soil.
Slave StatesTexasMontanaArkansasLouisianaMississippiKentuckyTennesseeAlabamaGeorgiaFloridaSouth CarolinaNorth CarolinaVirginiaMarylandDelawareFree StatesCaliforniaOregonMinnesotaIowaWisconsinIllinoisMichiganOhioPennsylvaniaNew YorkVermontMaineNew HampshireMassachusettsRhode IslandConnecticutNew JerseyThe rest weren't organized enough to be considered slave states or free states.Montana was not a slave state or a state of any kind during the Civil War. Missouri, however, was a Slave State that did not secede.
So the balance of slave to free states were equal in congress
Montana was not a part of the contingent United States at the time of the Civil War; thus, it was neither a free state nor a slave state during the 1800s.
Missouri, Arkansas, Flordia, and Texas
15 slave states and 19 free states during the American Civil War
After 1854, the Missouri Compromise, which was the attempt to balance the number of free states and slave states between the Northern and Southern states of the United States, was relinquished and replaced by the Kansas-Nebraska Act.
The Kansas-Nebraska Act of 1854
The Potomac divided the Confederacy from the Union, although Maryland was a slave-state, and so was DC at the beginning. The Ohio River divided the slave-states from free soil.
The Kansas-Nebraska Act of 1854 was proposed by Senator Stephen A. Douglas of Illinois, in order to create the territories of Kansas and Nebraska, and to ensure that future settlers in those territories would have the authority to determine whether slavery would be permitted with these territories.
The Kansas - Nebraska Act of 1854 enabled voters in the US Territories of Kansas and Nebraska vote as to whether be free or slave States once they entered the Union.
Slave StatesTexasMontanaArkansasLouisianaMississippiKentuckyTennesseeAlabamaGeorgiaFloridaSouth CarolinaNorth CarolinaVirginiaMarylandDelawareFree StatesCaliforniaOregonMinnesotaIowaWisconsinIllinoisMichiganOhioPennsylvaniaNew YorkVermontMaineNew HampshireMassachusettsRhode IslandConnecticutNew JerseyThe rest weren't organized enough to be considered slave states or free states.Montana was not a slave state or a state of any kind during the Civil War. Missouri, however, was a Slave State that did not secede.
The "Border States" were slave states.
slave states
Henry Clay's Compromise of 1850 sought to balance the free states and the slave states in balance. The Compromise lost its value with the passage of the Kansas-Nebraska Act of 1854.
The Union in the American Civil War represented the free states (meaning slave-free states) plus five border slave states in the north of America. The Confederate States of America (the Confederacy) comprised the eleven southern slave states which had seceded from the United States of America.