What defines a supplementary battle position?

A supplementary battle position is strategically selected to offer the best fire sectors along a less likely avenue of attack. This definition underscores the tactical purpose of such positions, which is to enhance defensive capabilities by providing overlapping fields of fire and ensuring that forces are ready to respond to threats that may not be expected by the enemy.

When establishing supplementary positions, commanders aim to create layers of defense, allowing for effective response should the primary defenses become compromised or if the enemy attempts to exploit a weakness. By focusing on less likely avenues of attack, these positions help to surprise and counter opposing forces effectively while making use of the terrain to maximize defensive advantages.

The context of why other options are less fitting helps clarify the concept: positioning behind enemy lines does not encapsulate the purpose of supplementary battle positions since these are intended for defensive, not offensive, operations. Logistics support focuses more on supply and sustainment rather than direct engagement in combat, which is not the primary function of these positions. Lastly, while command center locations are critical for warfighting, they serve a different purpose than the tactical advantages provided by supplementary battle positions focused on fire sectors and defensive measures.