a weird people whose military prowess reached levels that make no fricking sense
Even when you read the sources of their ennemies, they describe them as undefeatable.
When you read into it a bit more, past the wikipedia articles and actual history, you see them attacking North Africa in groups of like 100-200 men and winning everywhere, then they attack the Italians and Byzantines all over the place, same small groups, win literally every time against ridiculous odds, and all these engagements written by their enemies.
Then you read about them after the battle of Manzikert, and you have various Norman bands roaming around Anatolia defeating Byzies and Turks alike, finally settling in Germanikea or whatever the frick that fortress city in Cilicia is called.
They were literally top tier in war.
It makes no fricking sense.
So why were they so good at war ?