What collar device does a Marine Corps First Lieutenant wear?

A Marine Corps First Lieutenant wears one silver bar as their collar device. This designation is emblematic of the rank within the officer hierarchy in the Marine Corps. The single silver bar serves as a distinguishing feature that differentiates First Lieutenants from those of other ranks. It is important to note that each rank within the Marine Corps is represented by unique insignia, and the one silver bar specifically signifies the First Lieutenant rank, which is above Second Lieutenant and below Captain.

Understanding the insignia system is crucial for recognizing different ranks and the structure of command within the Marine Corps. This knowledge not only contributes to proper decorum in military settings but is also essential for effective communication and respect for the chain of command.