First Crusade (1095-1099) | Part 1

It began with an appeal for aid from the Christian Byzantine Empire, threatened by the rising power of the Muslim Seljuk Turks. But when Pope Urban II preached a sermon at Clermont in 1095, the result was unlike anything ever seen before.

The Pope offered spiritual salvation to those willing to go east to aid their fellow Christians in a holy war, and help liberate Jerusalem from Muslim rule. Knights and peasants alike signed up in their thousands, leading to the disastrous People's, or Peasants', Crusade, then to a much more organised and powerful Princes' Crusade. Their forces gathered at Constantinople, where they made an uneasy alliance with Byzantine Emperor Alexius I Comnenus.

Entering Anatolia, they helped to win back the city of Nicaea, then won a decisive but hard-fought victory at Dorlyaeum, before marching on the great city of Antioch...