Collar devices
General O-10 Gen		Can serve as Commandant of the Marine Corps if elected.
Lieutenant General O-9 LtGen
Major General O-8 MajGen
Brigadier General O-7 BGen
Colonel O-6 Col		Commands brigade-sized units.
Lieutenant Colonel O-5 LtCol		Commands battalion-sized units.
Major O-4 Maj		Serves as Executive Officer (XO) of battalion-sized units.
Captain O-3 Capt		Commands company-sized units.
First Lieutenant O-2 1stLt		Serves as Executive Officers (XOs) to company-sized units.
Second Lieutenant O-1 2ndLt		Lead platoon-sized units, and generally come straight from ROTC, The US Naval Academy, or Officer Candidate School.

This chart represents the U.S. Marine Corps Officer Rank Insignia. General is a military rank used by nearly every country in the world. ... Image File history File links I, Wguynes, am the artist of this graphic. ... Lieutenant General is a military rank used in many countries. ... Image File history File links I, Wguynes, am the artist of this graphic. ... Insignia of a United States Air Force Major General German Generalmajor Insignia Major General is a military rank used in many countries. ... I, Wguynes, am the artist of this graphic. ... A Brigadier General, or one-star general, is the lowest rank of general officer in the United States and some other countries, ranking just above Colonel and just below Major General. ... I, Wguynes, am the artist of this graphic. ... Insignia of a United States Air Force Colonel Colonel is a military rank, usually the highest below general grades, and just above Lieutenant Colonel. ... I, Wguynes, am the artist of this graphic. ... In the U.S. Army, Air Force and Marine Corps, a lieutenant colonel is a commissioned officer superior to a major and inferior to a colonel. ... I, Wguynes, am the artist of this graphic. ... Insignia of an 0-4 in the U.S. Armed Forces In the US Army, Air Force, Marine Corps and the British Army, a major is a commissioned officer superior to a captain and inferior to a lieutenant colonel. ... I, Wguynes, am the artist of this graphic. ... Captain is both a nautical term and a military rank. ... I, Wguynes, am the artist of this graphic. ... First Lieutenant is a military rank. ... I, Wguynes, am the artist of this graphic. ... Second Lieutenant is the lowest commissioned rank in many armed forces. ... I, Wguynes, am the artist of this graphic. ... United States Marine Corps Emblem The United States Marine Corps (USMC) is a branch of the U.S. military. ...