Which of the following is NOT a type of ambush?

The term "decisive" is not recognized as a type of ambush within military tactics, particularly in the context of cavalry scouting and operations. The concept of ambush typically involves specific strategic approaches designed to take advantage of the element of surprise against an enemy force.

Deliberate ambushes are planned in advance, allowing for thorough reconnaissance and positioning to create the most advantageous situation for an attack. Hasty ambushes, on the other hand, are set up quickly in response to a target of opportunity and are not as meticulously planned as their deliberate counterparts. Area ambushes focus on a specific location to target incoming enemy forces, using terrain and cover to enhance their effectiveness.

In contrast, the term “decisive” is more associated with the overall outcomes of military engagements rather than a specific approach to conducting an ambush. Therefore, identifying "decisive" as not being a type of ambush reflects a correct understanding of military tactics and language regarding ambush techniques.