What is the function of a supplementary position in a defensive battle?

The function of a supplementary position in a defensive battle is crucially focused on addressing unexpected enemy maneuvers. A supplementary position is strategically established to provide additional support and options in case the primary defensive line is compromised or faced with an unforeseen attack. By positioning forces in a supplementary manner, defenders create layers of defense, allowing them to react swiftly to changes on the battlefield. This flexibility is essential in managing surprise offensives, as it enables defenders to reinforce specific areas that may be under threat, thereby enhancing their overall defensive capabilities.

While other options touch on aspects of defense, such as counterattacks or fallback strategies, the primary distinction of a supplementary position lies in its role in managing the unpredictability of enemy actions.