The Underground Railroad was a network of people, houses, and roads that led slaves from the South to the North to escape their masters and enjoy freedom in the North and in Canada. Conductors were people who led slaves from one house to another to evade Southern rangers who were looking for their masters' lost slaves.
Based from this information, statements 1 and 4 are characteristics of the Underground Railroad.
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The Mongol invasions of Japan (元寇 Genkō), which took place in 1274 and 1281, were major military efforts undertaken by Kublai Khan to conquer the Japanese archipelago after the submission of Goryeo (Korea) to vassaldom. Ultimately a failure, the invasion attempts are of macro-historical importance because they set a limit on Mongol expansion and rank as nation-defining events in the history of Japan.
Souths economy depended on mostly cotton. when the cotton gen fastened the process, they mass produced it. and made lots of money than before. such was depended on agriculture while north had factories. yet cottons still didn't make that much as industries
Civil wars. Probably the most important single cause of Byzantium's collapse was its recurrent debilitating civil wars. Three of the worst periods of civil war and internal infighting took place during Byzantium's decline.
