What convinces Aeneid and Anchises that they must leave troy?

Aeneas and Anchises are convinced to leave Troy after a series of devastating events, including the fall of the city to the Greeks despite their efforts to defend it, the death of many Trojan leaders, and the intervention of the gods signaling that Troy's destiny has come to an end. Additionally, Aeneas receives a divine message from his mother, Venus, instructing him to flee the city and seek a new homeland to fulfill his destiny.