The Holy Crescent Moon...

Intro
We all know Islam, but the first thing that comes to your mind is probably terrorism. In reality, Islam has had a much more profound impact on world history. They united everywhere from Spain to India under one nation Larger than Rome. Eventually their expansion was halted by the Franks, but what if Islam rose earlier? What Charles Martel was not there to halt the Islamic expansion? What if Muslims forced People to convert? Well then, a map of the world would look like this: