Which war occurred in 12th century bc when an invasion force of mycenaean greeks sailed across the aegean sea and sacked troy?

Trojan War.

the Trojan War was waged against the city of Troy by the Achaean Greeks after Paris of Troy took Helen from her husband Menelaus, king of Sparta.

The Trojan War occurred in 12th century BC when an invasion force of Mycenaean Greeks sailed across the Aegean Sea and sacked Troy.

The Trojan War refers to the Bronze Age conflict between the kingdoms of Troy and Mycenaean Greece.

The war was waged against the city of Troy by the Achaeans (Greeks) after Paris of Troy took Helen from her husband Menelaus, king of Sparta.

The war broke out as a result of a quarrel between the goddesses Hera, Athena, and Aphrodite, after Eris, the goddess of strife and discord, gave them a golden apple marked "for the fairest".