Which characteristic emphasizes quick and decisive action in military operations?

The characteristic that emphasizes quick and decisive action in military operations is tempo. Tempo refers to the speed at which military operations are conducted, allowing forces to maintain a fast pace in execution. High tempo enables a military unit to seize and maintain the initiative, react rapidly to changing circumstances on the battlefield, and overwhelm the enemy before they can adequately respond. This swift execution is crucial in achieving operational objectives effectively.

While surprise involves the element of taking an enemy off guard, and audacity focuses on bold actions in the face of risk, it is tempo that specifically highlights the ability to act quickly and decisively. Flexibility, on the other hand, pertains to the capability to adapt to new conditions but does not inherently address the speed of action. Thus, tempo is the most relevant characteristic linked directly to prompt and effective military operations.