How is a standing army different from a mercenary one?

The standing army is recruited from the inhabitants of the country. It does not dissolve in time of peace, but is maintained at the expense of the state. Bases and barracks are designated for the standing army, trainings and exercises are conducted. The standing army takes an oath of allegiance and has a clear organization.

The mercenary army fights for money. She is recruited from foreigners who can strengthen the army during the campaign and hostilities. It can be characterized by indiscipline, as it is often controlled by its own commanders.