The first one, after the 4th crusade which saw the sacking of Constantinople by the crusaders who had been stranded there waiting for their payment from the emperor of the Byzantine empire, let's just say that the Byzantines weren't big fans of western Europe for a good while, but I could be wrong so wait for other answers :)
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Answer:
Explanation:
First, it increased the amount of land that could be planted each year. Second, it protected farmers from starvation if one of the crops failed. Throughout Europe, towns and cities had been in decay for centuries. Hope that helps!!!
Ambulances, new techniques, and more advanced care fro wounded soldiers.
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Right that’s what I have been wondering