Respuesta :
1) The Byzantine Emperor sought the crusaders’ help to defeat the Arab Muslims – 1905. The Byzantine Emperor asked for aid from the Pope to defeat the Arab Muslims in the Holy Land.
2) Western countries launched a series of crusades – 1096. The first crusade was launched.
3) The Fourth Crusade attacked and sacked the city of Constantinople – This happened in 1204, the attack of Constantinople was the culmination of the Fourth Crusade.
4) The Ottoman Turks conquered Constantinople – 1453. On the 29th of this year, the Ottoman army, led by Sultan Mehmed II who defeated the Emperor Constantine XI Palaiologos.
*The Byzantine Emperor sought the crusaders’ help to defeat the Arab Muslims*Western countries launched a series of crusades*The Fourth Crusade attacked and sacked the city of Constantinople *The Ottoman Turks conquered Constantinople