The Visigoths became tired of the Romans' demands, rebelled, and defeated the Roman legions at?
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not too sure on this one thinking tyo organize the division of africa

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

ok whats to talk about were you scared or what?