As the state was neutral, Irish cargo ships continued to sail with full navigation lights. They had large tricolours and the word "EIRE" painted large on their sides and decks. At that time, Allied ships travelled in convoy for protection from the U-boat wolfpacks. If a ship was torpedoed, it was left behind since the other ships could not stop for fear of becoming a target themselves. Irish ships often stopped, and they rescued more than 500 seamen, and some airmen, from many nations. However, many Irish ships were attacked by belligerents on both sides. Over 20% of Irish seamen, on clearly marked neutral vessels, died, in the Irish Mercantile Marine during World War II.
