Absorbed in its own factions and schisms, Europe failed to seize the occasion to break the Ottoman hold on the Balkans. Except for a brave but minor expedition led by Boucicaut—the last trickle of the crusades—Constantinople could obtain no more help from the West; Sigismund was embroiled with the Germans and Bohemia; France and England were each torn by domestic conflict. Bajazet’s son held his own against Tamerlane, the Mongol eruption subsided, Bajazet’s grandson advanced again in Europe, and in 1453 his great-grandson Mohammed II conquered Constantinople.
