The term "pax mongolica" (mongolian peace) is used by historians to describe

Pax Mongolica is a Latin phrase meaning "Mongol peace", used by Western scholars to describe the period of social, cultural and economic stability experienced by the different native peoples of Eurasia that were conquered by the Mongol Empire during the 13th and 14th centuries. The term is related to the flowering of commerce and communication between the conquered peoples and the period of relative peace that followed the vast conquests of the Mongols and has a parallel with that of pax romana, which refers to the peace that was experienced the Roman Empire in its moment of greater apogee.

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

not sure but thinking i'ts cause the government was broke. not sure