In the beginning Islam bore some similarities to Catholicism, such as there being a previously established power that tried to destroy them both. One of the biggest differences is that Catholicism, and for that matter Christianity, was most notable for being non-violent towards those that persecuted the faith early on, meanwhile Islam grew and expanded as a result of wars.

There were and still remain inextricable links between the two faiths, particularly in regards to the figures featured in their holy books. They both agree on there having been a man known as Abraham, and that there was a holy man by the name of Jesus who existed and preached the word of God. Both originate in the Middle East and many of the tales told in the Quran and Bible focus on that region.

It soon became apparent to all that this new faith and its people were on the rampage. In fact, the Byzantines and the Persians were beaten left and right when facing the Muslim armies. By the time their expansion had stopped, the religion of Islam ruled over one of the largest empires on Earth.

Meanwhile in Europe there were conflicts between pagans and Christians, and the forceful Christianization of the continent sprung up around this time as well. All this leaves us with the typical dynamic seen into the modern day, with a primarily Muslim Middle East and a mostly Christian Europe.