Calchas predicted that the first Achaean that set foot on Trojan land would be the first casualty of war. Thus even Achilles hesitated to try. Odysseus then threw his shield to the sandy Trojan land and jumped on it without touching the ground. Protessilaos, leader of Thessalian Fylacae, was fooled and disembarked first. The battle began with fury, and the Achaeans were trying with all their forces to establish bridgeheads on the beach, to make their landing easier.
In this first battle, Achilles played a leading role, which at some point faced with Cyknos, the son of Poseidon and Kalyche, who had gotten a gift from his father not to be injured by a bronze weapon. Achilles was able to kill him by hitting him with a stone on the head. As the Trojans saw Cyknos drop dead, they panicked, retreated and barricaded behind the walls of Troy.