Complex sentence: During the period of the Napoleonic Wars, two vessels have served the British Royal Navy as His Majesty's Hired armed cutter "Idas", named for Idas, a figure from Greek mythology.
Split into simpler sentences: During the period of the Napoleonic Wars, two vessels have served the Royal Navy as the Hired armed cutter "Idas". The name "Idas" comes from Idas, a figure from Greek mythology.