Congo River, formerly Zaire River, river in west-central Africa. With a length of 2,900 miles (4,700 km), it is the continent's second longest river, after the Nile.
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we don't have the list, at least the first one is the one you'll have to do yourself. but you can also just look up what vertical integration is.
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During the Civil War , federal powers expand to include an income tax and a national currency.
Europe came under the rule of one emperor when Charlemagne was crowned.