"invading muslim hordes" sounds weirdly demeaning. Why not just say "invaiding muslim armies"? Just curious.
Asian armies = hordes
European armies = armies?
Asian armies = hordes
European armies = armies?
They certainly weren't a Muslim army, though.
https://en.wikipedia.org/wiki/Mongol_military_tactics_and_or...
Some of the Arabian tribes (and later in central Asia) were nomadic, but few of the Muslim groups attacking Europe were.
The core of the Ottoman army that conquered Constantinople was made up of their Janissaries[1], a large majority of whom were European.
The Muslim Seljuk empire grew from Nomadic tribes, but didn't really threaten Europe.[2]
The Umayyad Caliphate was a well organised, centralised empire by the time they invaded Spain.