[DanHoward]

Originally Posted by fredtheobviouspseudonym

There were exceptions. IIRC the condottieri of the fourteenth/fifteenth centuries were almost always Italians themselves, but still known as mercenaries. For Germany, Fritz Redlich in his "The German Military Enterpriser and his Work Force" talks about the sixteenth & seventeenth centuries, but does look at the antecedents of mercenary use in the fourteenth/fifteenth centuries. All the employees of the above were German.

Troops of the late Middle Ages and the early modern era serving for pay, rather than to fulfill a feudal obligation, tended to be known as mercenaries despite their national origins.

We have a pretty clear definition of the word "mercenary". The majority of fighters in late medieval armies and castle garrisons don't fit that definition.