Messapus join with whom in a battle against Aeneas and the Trojans which was described in the Greek Epic Cycle, in particular in the "Iliad"?
Messapus:  Although accustomed to peace, in Book VII Messapus joins forces with Turnus in his battle against Aeneas and the Trojans. Troy:  It was the setting of the Trojan War described in the Greek Epic Cycle, in particular in the "Iliad", one of the two epic poems attributed to Homer.
Turnus