Classical civilizations developed? whereas early river valley civilizations did not

Early river-valley civilizations were just beginning to use agriculture and tools while classical period civilizations had been using tools and agriculture for much longer.

vast empires

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in 1859, brown and 21 of his followers attacked and occupied the federal arsenal in harper's ferry. their goal was to capture supplies and use them to arm a slave rebellion. brown was captured during the raid and later hanged, but not before becoming an anti-slavery icon. abolitionist and insurrectionist

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