Which of the following is a minor terrain feature found on a military map?

A spur is recognized as a minor terrain feature on a military map. It is defined as a short obstruction that extends from the side of a hill or mountain, resembling a 'finger' protruding from a larger landform. In military navigation and operations, understanding minor terrain features like spurs is crucial because they can impact movement, cover, concealment, and overall tactical decisions on the battlefield.

In contrast, the other options represent major terrain features. Hills are elevated areas that can significantly influence visibility and firepower; ridges are long and continuous elevated areas and provide strategic viewpoints and routes; valleys, which are low areas between hills or mountains, can serve as natural transportation routes. Understanding the different classifications of terrain features helps soldiers navigate and utilize the landscape effectively during operations.