Gulliver earned the title of "Nardac" when he captured the ships of the Blefuscu soldiers and took them over to the kingdom of Lilliput.
Explanation:
When the kingdom of Lilliput and Blefuscu were at war against each other, the emperor of Lilliput asked Gulliver to help them. So, Gulliver made hooks with cables attached and swam over to the shore of Blefuscu. He then attached each hook to the ships and tied them together. Even the arrows fired by the Blefuscu soldiers doesn't have any impact on him. He pulled the ships all the way to Lilliput, where he was greeted as a hero. After three weeks, a delegation from Blefuscu arrived to surrender and peace was restored. Gulliver was given the title of a "Nardac" or a high ranking officer.
