one of the good Emperors is Emperor realize that the Roman Empire had grown too big to affectionately and he began to pull back troops from most of Mesopotamia he also built a wall across Northern Britain to keep out the picts and Scots? help!!!

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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the anwser is missions