The first Crusade began in 1095… 460 years after the first Christian city was overrun by Muslim armies, 457 years after Jerusalem was conquered by Muslim armies, 453 years after Egypt was taken by Muslim armies, 443 after Muslims first plundered Italy, 427 years after Muslim armies first laid siege to the Christian capital of Constantinople, 380 years after Spain was conquered by Muslim armies, 363 years after France was first attacked by Muslim armies, 249 years after Rome itself was sacked by a Muslim army, and only after centuries of church burnings, killings, enslavement and forced conversions of Christians.
By the time the Crusades finally began, Muslim armies had conquered two-thirds of the Christian world.
Europe had been harassed by Muslims since the first few years following Muhammad’s death. As early as 652, Muhammad’s followers launched raids on the island of Sicily, waging a full-scale occupation 200 years later that lasted almost a century and was punctuated by massacres, such as that at the town of Castrogiovanni, in which 8,000 Christians were put to death. In 1084, ten years before the first crusade, Muslims staged another devastating Sicilian raid, burning churches in Reggio, enslaving monks and raping an abbey of nuns before carrying them into captivity.