Can we draw the following hypothesis from the context?

Context:

From 1016 to 1030 the Normans were pure mercenaries, serving either Byzantines or Lombards, and then Sergius of Naples, by installing their leader Rainulf in the fortress of Aversa in 1030, gave them their first pied-a-terre and they began an organized conquest of the land.

Hypothesis: Normans were pure mercenaries leaving fatherless children everywhere,
It's impossible to say