Which region of the world was considered a crossroads of trade and commerce during the medieval period

Buddhism

Explanation:

many sources point to this but im not exactly 100%

more like 98.2%

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.