Yes, I was more thinking of the European Renaissance period, where many armies incorporated large mercenary contingents which some of them, like the Landsknecht

Yes, I was more thinking of the European Renaissance period, where many armies incorporated large mercenary contingents which some of them, like the Landsknechts, happily changing employers. Italian Condotierri were also notorious for this behaviour. Though it should be said that employers were not necessarily more trustworthy, and could be prone to "forget" to pay the mercenaries they had hired once they had no more need for them.