The crusades were wars. they were between the Christan's and the Muslims. they were mostly over land the Muslims had taken over. It all started when the Muslims took over Jerusalem. The pope called for war to take it back and that is what he got.
The Mongols were never able to expand to Western Europe, the farthest west they could get was Eastern Europe.
Muslims never think of taking over the world. Quran and prophet Muhammad teachings call for cooperation with all the peoples of the world for the spread of peace and benefits to mankind.
Spain
their goal was to take back Jerusalem from the Muslims, but they never did.
spain
Well, unless you can bike over water, it'd take you somewhere around, oh, I don't know, never to never? Hope that helped.
eastern Europe
it the Africa Americans that take over Europe Asia all those other countries are battling Europe to take over their world
they would take people to the right path ISLAM
The Ottoman Turks
ya