Other answer isn't quite right. The technique with naval rams was to open the seams in the enemy ship, so they'd flood and sink. The ram is not designed to penetrate into the enemy ship, and the ramming surface was basically as big as they could get it in order to not get stuck in the enemy ship while still hitting with force. So more a hammer than a blade.

There were some marines on deck, but they were basically for emergencies only if the ships got stuck together or boarded somehow.

The Iliad doesn't actually fit the geography or the timeline very well. Also the people in the Iliad are physically bigger than humans, there are talking horses, and gods directly intervening. It is not a historical document.

The Trojan War never happened, but a city that 8th cent Greeks called Troy exists. So yes we know the location of Troy, but the city postdates the story.