What term is used to describe the leading element of a column?

The term used to describe the leading element of a column is "head." In military terminology and drill procedures, this term signifies the foremost individual or unit within a formation. The head serves as the point of reference for the rest of the column, with all subsequent members positioned behind it. This designation is crucial for maintaining order and allowing for precise movements and commands, as the head dictates the pace and direction for the rest of the unit.

The other terms mentioned have specific meanings that differentiate them from "head." "Guide" typically refers to a member designated to help maintain alignment and direction within a formation but isn’t specifically about the leading element of a column. "Flank" denotes the side of a formation, especially in relation to aerial or ground movement, while "advance" refers to the forward movement itself rather than the position of the leading element. Understanding these distinctions helps to clarify the structure and command within military drill formations.