The following year Mohammed the First was struck with apoplexy, and died suddenly, leaving his empire, as before stated, to his son, Amurath the Second. The new ruler immediately advised the neighbouring princes of his accession to the Turkish throne, entering into alliances, and making truces or treaties of peace with such as had been hostile to the Ottoman power. All but the Greek Emperor appeared to be friendlily disposed, and he, doubtless thinking to take advantage of the new monarch's youth, instantly summoned Amurath to place his brothers in his hands, as hostages for the performance of some clause in his father's testament. Emanuel, moreover, threatened the youthful Sultan that unless he complied with the demand, he would release Mustapha, his uncle, the legitimate heir to the Turkish throne, and assist him by force of arms to recover his usurped rights.
Amurath's clever minister refused the demand with indignation, asserting that the law of the prophet did not permit the children of true believers to be brought up amongst _ghiaours_.* The Greek Emperor, true to his menace, and all unmindful of the dangerous vicinity of the Ottoman dominions to his own, set the pretender free, and gave him every requisite for the commencement of his dangerous adventure, upon condition that he made over Gallipoli, and several other towns, to the Greeks.
Thus befriended, the royal claimant, accompanied by ten galleys containing his followers and adherents, proceeded to Gallipoli, where he no sooner disembarked than the town and suburbs acknowledged his pretensions, only the garrison of the fortress holding out. Leaving a small besieging force before the town, he made rapid marches towards the Isthmus of Athos, his army increasing rapidly as he proceeded, and several places falling into his hands. The Sultan sent his Vizier to Adrianople, where he collected an army of thirty thousand men, with which to oppose the invaders. Several great vassals of the empire having now declared for Mustapha, he was quite prepared to face the imperial army, and as soon as it came in view he advanced courageously towards it, and commanded the troops to lay down their arms. As if by magic, says one historian, the soldiers obeyed, and the pretender suddenly found himself master of the situation without having to lose a single man. The unfortunate Vizier and his brother were captured; the former was put to death, but the latter released.