For the first time modern weapons were introduced to the war. These new devices caused death in paramount proportion on both sides; the loss of life was immense. (you must check 5 boxes that identify these new modern weapons)

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration

explanation:

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by limiting types of goods produced