There, he and his companions composed the Livre des Cent Ballades, a poetical defense of the chaste knight, the central figure of chivalry, which Johan Huizinga found a startling contrast with the facts of his military career.

Because of his great service in the war against the heathens in Livonia and Prussia, he was named Marshal of France on 25 December 1391 by Charles VI at the cathedral of St. Martin in Tours.

According to one source, he was only saved because his companion, John the Fearless, son of Philip the Bold and future Duke of Burgundy, "begged the sultan to spare his good friend.

Later on, Boucicaut wanted to attack Alexandria but he was prevented by adverse winds to land there, he later went to Tripoli, then after a costly attempt to capture it, he went south to Botron which was burned and pillaged, then to Beirut on 10 August 1403, which was also sacked and 500 bundles of spices worth 30,000 ducats were taken from the Venetian warehouses there, he later went to attack Sidon then Latakia, which both showed resistance due to strong garrison, he returned to Famagusta in late August, eventually to settle in Rhodes in September, where he dispatched 500 men with two large ships who tried in vain to take Alexandria.

He was buried in the Collégiale Saint-Martin, at the location of what is now the Basilica of St. Martin, Tours, in his family's chapel, with the epitaph "Grand Constable of the Emperor and of the Empire of Constantinople."