Mandalorian Commandos

The Mandalorian Commandos were led by the false Mand'alor D'kyn Beviin. He controlled the Mandalorian people into fighting a war for him, and did not accept resistance. He made a secret alliance with the Sith Legion, not knowing they were actually controlling him to use the Mandalorian people. The Commandos were opposed by the Mandalorian Avengers, who were led by Atin Ordo. The Avengers eventually defeated the Commandos and combatted the Sith.