John Hunyades _had_ military experience, and looked with cold disfavor on the burning and blind zeal of his new recruits. He was willing that they should aid him in repelling the furious attacks of the Turks, but to his trained eyes an attack on the well-intrenched camp of the enemy would have been simple madness, and he sternly forbade any such suicidal course, even threatening death to whoever should attempt it. In truth, his caution seemed reasonable. An immense host surrounded the city on the land side, and had done so on the water side, also, until the Christian flotilla had sunk, captured, and dispersed its boats. Far as the eye could see, the gorgeously-embellished tents of the Turkish army, with their gilded crescents glittering in the sun, filled the field of view. Cannon-mounted earthworks threatened the walls from every quarter. Squadrons of steel-clad horsemen swept the field. The crowding thousands of besiegers pressed the city day and night. Even defence seemed useless. Assault on such a host appeared madness to experienced eyes. Hunyades seemed wise in his stern disapproval of such an idea. Yet military knowledge has its limitations, when it fails to take into account the power of enthusiasm. Blind zeal is a force whose possibilities a general does not always estimate. It is capable of performing miracles, as Hunyades was to learn. His orders, his threats of death, had no restraining effect on the minds of the crusaders. They had come to save Europe from the Turks, and they were not to be stayed by orders or threats. What though the enemy greatly outnumbered them, and had cannons and scimitars against their pikes and flails, had they not God on their side, and should God's army pause to consider numbers and cannon-balls? They were not to be restrained; attack they would, and attack they did. The siege had made great progress. The reinforcement had come barely in time. The walls were crumbling under the incessant bombardment. Convinced that he had made a practicable breach, Mahomet, the sultan, ordered an assault in force. The Turks advanced, full of barbarian courage, climbed the crumbled walls, and broke, as they supposed, into the town, only to find new walls frowning before them. The vigorous garrison had built new defences behind the old ones, and the disheartened assailants learned that they had done their work in vain.