_See_ Ayacucho. Constantine (Conquest of Algeria). This fortified city in Eastern Algeria, which, under Hadji Ahmad, had held out for six years against French rule, was invested by the French, 7,000 strong, under Marshal Clausel, in the autumn of 1836. Having no breaching pieces, Clausel essayed an assault, but was repulsed with a loss of 2,000 men, and abandoned the siege. In the following year General Damrémont sat down before Constantine October 6, with 10,000 men, and on the 12th, a breach having been effected, an assault was on the point of taking place, when Damrémont was killed. His successor, General Valée, however, took the place by storm on the following day. Constantinople (Moslem Invasion of Europe). This city was besieged in 668, by the Saracens under Sophian, the lieutenant of the Caliph Moawiyeh. The Moslem fleet passed the Hellespont unopposed, but their attack upon the city was met with a most determined resistance. After keeping the field from April to September, Sophian retired into winter quarters, but renewed active operations during the following and five succeeding summers, without success, until, in 675, he finally abandoned the siege, having lost in its progress over 30,000 men. In 716, the Saracens again laid siege to the city, with 120,000 men under Moslemeh, brother of the Caliph Solyman. A fleet of 1,800 sail co-operated with the land forces, but was destroyed by the Greek fire ships, and thus obtaining the command of the sea, the citizens were relieved from all fear of famine, and repulsed all Moslemeh’s assaults. After a siege of 13 months, the Saracens withdrew, after a defeat at the hands of a Bulgarian relieving army, in which they lost 22,000 men. Constantinople (Fourth Crusade). The city was besieged July 7, 1203, by the French and Venetian Crusaders under Count Thibaut de Champagne. After a feeble defence, it was surrendered July 18, by the Usurper, Alexius, and occupied by the Crusaders, who restored Isaac Angelus to the throne, and withdrew. In January 1204 the Crusaders again laid siege to Constantinople, and at the end of three months, in the course of which Isaac Angelus died, and Mourzoufle assumed the purple, they stormed and pillaged the city. Baldwin was then proclaimed first Latin Emperor of the East. On July 25, 1261, Constantinople was taken by surprise by the troops of the Greek Emperor, Michael Palæologus, under his lieutenant, Alexius Strategopulus. The Latin Emperor, Baldwin II, made no attempt at resistance, but escaped to the Venetian galleys, and the restoration of the Greek Empire was accomplished without opposition. Constantinople.