<em>Civil wars and foreign invasions showed that the empire had become too large to be ruled by one person.</em> :-)
Answer: The North had way more manpower.
Explanation: The north was always populated to begin with since the living standards were a lot higher than in the south. And when the northern states "forbided" slavery a mass migration of African Americans from southern states moved to the northern states. They migrated to find a better life up in the north(before the civil war). When president lincoln gave the to go sign that African Americans were able to enlist in the army during the American civil war it gave the North a manpower increase, one that the south didn't have since the south did not allow African Americans to be enlisted in thir arms.
وينبني هيتبرع هينيز نقترب عبر عينك حضنك مثمن نينوي نحصى كينير نبوح —
Its is a no human inhabitant because nobody lives there is no residents nor community on the land also <span>no permanent residents.</span>
The Great Migration/ The North Migration. The time period was fro 1916 to (I believe) 1970. During this time people migrated from the South to the North because they had so many more opporunities compared to in the South since they had actual factories there.