The insignia for Colonel (COL) consists of which of the following devices?

The insignia for Colonel (COL) in the U.S. military is represented by a silver eagle. This symbol is designated specifically for the rank of Colonel across various branches, including the Army, Air Force, and Marine Corps. The silver eagle denotes a higher command level, reflecting the responsibility and authority associated with the Colonel rank.

In contrast, other ranks are represented by different insignias. For example, one gold bar is typically used for the rank of Second Lieutenant, while a gold oak leaf represents the rank of Major. Two silver bars occur as the insignia for the rank of Lieutenant Colonel. Understanding these insignias is essential in recognizing the hierarchy and structure of military ranks.