In ten years it has grown into what one reporter called the 'world's most powerful mercenary army,' with more than 2,300 contractors in nine countries.

Eventually, they were able to persuade the entire mercenary army to revolt.

They had their own mercenary army for the protection of their merchandise.

He then fights a series of running engagements with the mercenary armies, keeping them off balance.

The knightly classes found their monopoly on arms and military skill undermined by the introduction of mercenary armies and foot soldiers.