Cute Young Brunette Girl Posing At The Bastion Wall

• A demi-bastion has only one face and flank. To fortify the angle of a place that is too acute, they cut the point, and place two demi-bastions, which make a tenaille, or re-entry angle. Their chief use is before a hornwork or crownwork.
• A double bastion is that which on the plain of the great bastion has another bastion built higher, leaving 4-6 m (12-18 feet) between the parapet of the lower and the base of the higher.