§ 2. [T]he commissioned and staff officers of the infantry are hereby required to meet at the place of holding their battalion musters at eleven o’clock on the day preceding said muster, armed with a rifle, musket, or shot gun and dressed in the uniform prescribed by law, for the purpose of being trained as at regimental drills, and the commanding or senior officer present shall call, or cause the roll to be called, and make a return of all delinquents to the next regimental or battalion court martial. § 3. That regimental courts martial shall have power to fine …