So, here we finish another instalment, hope you guys are enjoying reading it as much as i'm by writing it.
The first crusade called in the game was a failure, that means only small powers such as independent dukes, insignificant kingdoms or republics such as Venice participated. While they sometimes mount an interesting offensive, specially due to the "join larger army" mechanic introduced in the previous patch, the Fatimid Caliphate brings their absurd doomstacks of 20K troops (if you pay atention to the picture of the Crusade, you'll see a 9K enemy army coming from Sinai, while my miser 950 men walk lonely in Palestine.

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Crusades for Jerusalem are usually the hardest to succeed, specially the first ones, because the Caliphate is too strong. Only if a superpower like the HRE or France decides to enter, they will triumph. I myself captured the Kingdom of Jerusalem many times, but as late as 1180 A.D., its not impossible if you pick the right cards

. However, other common crusade targets, such as Barcelona (after its inevitable conquest by the Muslims), Mauretania or Egypt, are apparently easier to succeed.
About the Jihad for Anatolia against the ERE in the beginning, it also failed horribly, as it's usual: the muslims never suceed in defeating Byzantium. In fact, in this campaign, for the first time since i bought the game, i've seen the Muslims actually defeat them and grab a large piece of Asian land, but that was much later, in 1300s. Until this moment, however, you'll see that Byzantium standing solid as a brick.
Also, about the culture shift my great-grandson experienced, remember this, for it'll be fundamental to the development of the story. In CK II, for those who don't know, culture is an important opinion modifier. Characters with different cultures have the "foreigner" opinion malus, with might be smaller or less depending with they share a same cultural group (ex: Danes and Norwegians dislike each other less, for they belong to the "North Germanic" group, while hate more a Frankish or Italian ruler/vassal, for these belong to the "Latin" group. Relating to the story, Welsh belongs to "Celtic" group, together with Scottish and Irish, while Saxon is "West Germanic", same group of the Flemish