captain-of-the-guard

Suppose the captain of your guard, a loyal servant of the kingdom for many years, has suddenly committed crimes you cannot overlook. How would you address this treason to secure your throne and lineage?

• Exile him to far off lands, where he may gather allies to return~
• Place him under house arrest, with a rotation of guardsmen day and night~
• Imprison him in a dungeon or high tower, quietly as you can, where the people may not find him~
• Publically execute him, and patrol the streets with soldiers to solidify your rule~