How may history have been different if the aztecs has defeated the spanish? ?

The Aztecs having defeated the Spanish now have guns, powder and canons; not to mention steel swords and armor. This would have given them the upper hand against there enemies the Tlaxcala. ... They would have destroyed the Aztec empire assimilating it into its knew found confederacy of the Tlaxcala Covenant.

d. japan's attack on pearl harbor

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.