The Kansas Nebraska Act on 1854 lead to the Civil war because both Kansas and Nebraska allowed the people to decide if they should or shouldn't allow Slavery into their borders.
Explanation:
the conflict began after Athens and Eritrea gave assistance to tue lonians in their rebellion against Persia and it ruler, Daruis. Although Darius was able to secure the loyalty of many Greek city-states, both Sparta and Athens executed his ambassadors rather than give up independence.
The correct answer is - preserved the union.
The Civil War in the United States was a long and bloody conflict. It was between the North and the South, the two halves that had totally different policies and ambitions for the future. Despite the war being terrible and with lot of people who lost their lives, as all wars, something good came out of it too. The big positive of the Civil War was that it actually managed to preserve the unity between the states, thus creating the mighty United States of America, which eventually became the biggest power house on the planet.
