Here the Greeks layed siege to the Trojans demolishing everything. The Trojans were so surprised that they could not effectively fight
The Gods themselves told Aeneas that Troy was going to fall no matter what and she shouldn't die in a waste trying to protected this doomed city. They told him that his mission was to leave Troy and create a new city.
After he was told to leave, Aeneas quickly gathered his family and his men and left the city, although his wife died during the escape. They successfuly escaped with 20 full loaded ships.
Aeneas wandered the Mediterranean for many years attempting to settle in 3 other places but failed, he came across Italy where he found his the perfect place to settle but it wasn't Rome, it was Lavinium. Named after the daughter of the King Latium, Lavinia.
Lavinium welcomed the exiled Trojans and the trojans settled into this new land and that is where the story of Aeneas ends.