[1] He inherited the county of Beaumont-le-Roger from his father (1343) and became Duke of Durazzo in right of his second wife, Joanna, in 1366.

[1] He received assistance from both his brother and the king of France in this undertaking[3][4] for Durazzo (the remnant of the kingdom) was in the hands of Charles Thopia.

[5][6] In 1372, he brought over the Navarrese Company of mercenaries, who had fought with him during the war in France, to assist him in taking Durazzo.

Many documents survive providing information on the complex nature of the military planning and engineering which was undertaken to ensure success.

[17] Louis had no legitimate children with his Angevin wife Joanna, Duchess of Durazzo, although he had many illegitimate children with his mistress Maria de Lizarazu who was a Navarrese noblewoman.