What does an officer wear to signify the rank of Captain in the Marine Corps?

In the Marine Corps, the rank of Captain is designated by the insignia of two silver bars. This specific insignia is used to visually represent the rank and helps in easily identifying officers' ranks within the military structure. The use of silver bars for Captains is consistent across various U.S. military branches, reinforcing the uniformity and standardized recognition of ranks.

The insignia for other ranks differs significantly. For example, a single silver bar represents the rank of First Lieutenant, while a gold oak leaf is the insignia for a Major. A silver oak leaf is reserved for the rank of Lieutenant Colonel. Understanding the distinct visual identifiers for each rank is essential for ensuring clarity and respect within the military hierarchy.