Byzantium/Constantinople was conquered in 1451, but the empire continued to decline starting around the 18th or 19th centuries. It officially died in WWI. As for how long it was a major threat to Europe, the empire's prime was the 16th century, under Suleiman the Magnificent.
Answer:
They where both places of religious tolerance.
I would say justice and democracy.
Answer: new settlers arrived at a steady rate and the population increased gradually
Explanation:
1861 to 1865 the war known as the Civil War was in process. It was on of the bloodiest fights in history The war took place in the eleven southern states, where the union took the win. Out of the 34 U.S states 7 of the slave states declared secession from the United States and formed the Confederate States of America. In 1861 war started as the states attacked a U.S fortress called Fort Sumter.
The confederacy grew to 11 states instead of 7. After they had taken over two more states and a couple of western states as well. The war left thousands dead, and family's devastated. The war ended because the confederate armies was surrendering after the corrupt government of the confederacy.