Is a leader a "unit"?

[Schoenwulf]

In Scenario 16 from AAaD, VP's are awarded to American units exiting the map. In the 4th Ed. rules a leader is described as follows: "Individuals who activate and direct other units". This seems to imply that leaders are one-step units because of the "other" reference, and the differing definition for personnel units later in the definitions section. Is that a correct interpretation of the status of leaders with regards to steps, and in this case, VP's?