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.
They had their own strategies and it would be foolish to think that they didn't have thier own desires and knowledge. They were choosing the European powers which they thought would serve their cause, that is why some supported one European power and the others supported another European power. Their role was great because they knew the ground well.
The plague of Justinian plagues was a pandemic that afflicted the eastern Roman Empire especially its capital Constantinople the Sassanid empire and port cities around the entire Mediterranean Sea
How long it lasted was for 541 AD - 542 AD
