Answer:
It is not clear. Menelaus was presumably inside the Trojan Horse, so it is possible that--if the Trojans had managed to kill the Greeks inside the horse-- the war would have ended since the whole point of the war was to get Helen (his wife) back. However, it is likely that Agamemnon (his brother) would have continued the war in the name of vengeance.
OR ---
The Trojan Horse was a last ditch attempt because the Greeks did not have a siege train and could not breach the walls. Nor were they strong enough to starve the city out. Having successfully ended their looting expedition of the coast of the Aegean Sea, which was their object, and with now no hope of capturing the richest prize Troy, they would have gone home to enjoy their loot and slaves.
Step-by-step explanation: