Which of these does NOT fall under small unit tactics?

The correct choice is the one that indicates an activity that does not align with the principles of small unit tactics. Small unit tactics primarily involve the maneuvers and strategies employed by small, organized groups, typically focusing on direct combat engagement and operational coordination.

Hostage negotiation is a specialized skill that requires a different set of approaches primarily used in law enforcement and crisis management scenarios rather than in military tactics. This type of operation emphasizes communication, psychological strategies, and conflict resolution, which are distinct from the principles of combat movement and engagement that define small unit tactics.

On the other hand, team movement formations, ambush planning, and combat engagement strategies all directly pertain to how small military units operate in the field. These tactics involve coordination, teamwork, and strategic planning specific to combat scenarios, focusing on the effectiveness of smaller groups in military operations.