Which of the following is NOT a classification of fighting positions?

The correct choice indicates that secondary positions are not typically recognized as a distinct classification in the context of fighting positions. In military terminology, fighting positions are categorized primarily into primary, alternate, and supplemental positions.

Primary fighting positions are the main defensive structures established for personnel to engage the enemy effectively. Alternate positions serve as backups that can be used if the primary position becomes compromised or untenable. Supplemental positions provide added layers of defense or may allow for additional offensive capabilities without being the main fighting point.

By identifying "secondary" as the incorrect classification, it highlights the importance of understanding these terms within military doctrine. This classification framework helps ensure clear communication and strategic planning in combat operations, with designated roles for each type of position to enhance overall effectiveness.