How was the empire of Alexandria established? Please briefly talk about its contribution to world culture. Brief! Exquisite:

Establishment: King Alexander of Macedonia sent troops to March eastward, swept across Asia Minor and Egypt, occupied two river basins, destroyed Persia, established Alexander Empire in Europe, Asia and Africa, with Babylon as its capital.

Contribution: 1: The economic and cultural expansion of people in different countries has objectively strengthened the ties between these regions.

2. Greek culture spread to the east, and eastern culture infiltrated to the west, which promoted the exchange and integration of eastern and western cultures.