Which battle position covers the enemy's most likely avenue of approach into the assigned area?

The primary battle position is designed to cover the enemy's most likely avenue of approach into the assigned area. This position is strategically selected based on terrain and the anticipated routes the enemy would use to advance. It allows for optimal engagement with enemy forces, maximizing firepower and effectiveness in the defense. The primary position offers the best field of fire, concealment, and observation capabilities.

In contrast, secondary, tertiary, and alternate positions serve different purposes. The secondary position acts as a fallback or support area when the primary cannot be held, while the alternate position might be utilized if the primary and secondary positions are compromised. Tertiary positions are typically less fortified and might be used for less critical engagements. Thus, the primary battle position plays a crucial role in effectively defending against enemy advances by focusing on the most probable attack routes.