First Lieutenant

Army, Air Force, and Marine Corps insignia of the rank of First Lieutenant. Style and method of wear may vary between the services.

First lieutenant is a military rank in many armed forces. They are considered commissioned officers and in some militaries an appointment.

The rank of lieutenant has different meanings in different military formations. In the majority of cases it is common for it to be sub-divided into a senior (first lieutenant) and junior (second lieutenant) rank. In navies it may relate to a particular post rather than a rank.