Who: proslavery and antislavery What: civil war in the United States, fought between proslavery and antislavery When: bill became law on May 30. Kansas entered into the Union a free state on January 29, 1861. Where: Missouri
led to the Civil War because it led to the establishment of the Republican Party.
many lives were lost and Kansas and Nebraska territories in 1854 under the principle of popular sovereignty provoked a protracted political crisis in both Kansas and the nation at large.