Yes, there were five states that joined the Union in war, but I do not think they were ten years apart.
Yes, I would say that good leadership was key to Imperial Rome's success because to be able to conquer such a vast area north of the Mediterranean stretching from Spain (and England) in the west to Palestine in the east and to be able to exploit the mineral deposits of many of these countries and to control the areas conquered without major rebellions must have required good leadership.
Answer:
D South Carolina's Commons House of Assembly passed the Intolerable Acts in an attempt to protect colonists from British policies.