Which of the following best describes an ambush?

An ambush is best defined as a surprise attack from a concealed position on a target. This definition captures the essence of what an ambush entails: the element of surprise, the strategic choice of location to remain hidden, and the intent to attack unsuspecting adversaries. In military tactics, the effectiveness of an ambush relies heavily on the attackers using the terrain or natural cover to their advantage, allowing them to launch their assault when the enemy is least prepared.

The other choices do not encapsulate the true nature of an ambush. For instance, an attack from a forward operating base represents a more conventional military operation rather than the surprise and concealment aspects fundamental to an ambush. An open confrontation with armed forces involves both sides being aware of each other’s presence and preparing for engagement, which contradicts the surprise element of an ambush. Lastly, a planned assault supported by airstrikes involves coordination and visibility of forces rather than the stealth and suddenness typical of ambush tactics. Thus, the characteristics outlined in the correct choice align closely with established military doctrine surrounding ambush techniques.