Why would slavery be an issue when the United States added these new territories ? How did this contribute to the growing tensions in the United States ?

The compromise lasted until the passage of the Kansas-Nebraska Act in 1854, when Illinois Senator Stephen Douglas proposed legislation allowing the issue of slavery to be decided in the new territories. ... Once the transatlantic slave trade was prohibited, domestic slave trading throughout the South increased.

Explanation:

the answer is jerusalem

we can argue that appeasement caused world war ii because it allowed hitler and the nazis to build germany’s military power until it was strong enough to fight a major war. additionally, appeasement emboldened germany, making it think the allies would never have the will to fight. this made germany much more aggressive and encouraged it to take the steps that eventually led to war.