Captain

In most Inner Sphere and Periphery militaries, soldiers with the rank of Captain command companies.

Lyran Commonwealth and Lyran Alliance

The LCAF and LAAF use the rank of Hauptmann for company commanders. These officers are the highest rank that routinely see combat. To honor these officers, the Lyran Alliance's first OmniMech was named the Hauptmann.

LAAF Military Rank Insignia

Rank	Insignia
Hauptmann

Draconis Combine Mustered Soldiery

The DCMS uses Tai-i to indicate company commanders. Their symbol is a royal blue "5". The Draconis Combine Admiralty rank is Chu-i.

DCMS Officer Ranks by branch of service

Rank	MechWarrior	AeroSpace Fighter	Infantry	Armor	Artillery	Naval Crew Draconis Combine Admiralty	Technical Service
Tai-i (Captain) Chu-i (Lieutenant)

Armed Forces of the Federated Suns

Captains in the AFFS use an epaulette with one narrow band across the base as their rank insignia.

AFFS Captain's Insignia by branch of service.

Rank	MechWarrior	AeroSpace Fighter	Infantry	Armor	Naval Crew	Technical Service	Administrative	Medical	Legal	Logistics/ Transportation
Captain

Capellan Confederation Armed Forces

Prior to Sun-Tzu Liao's ascension to the Celestial Throne, the CCAF used the rank of Captain to indicate the commanding officer of a company. Due to the CCAF's unique rank structure at that time, Captains and Majors were assigned to a variety of different duties that would be handled by higher ranking officers in other militaries.

After Sun-Tzu became Chancellor, he introduced several new ranks into the CCAF as part of Xin Sheng. These ranks were given new Chinese names, and resulted in several promotions. Officers who held the rank of Captain under Romano Liao were renamed Sao-shao equivalent to Major in other militaries. Officers who command companies now hold the rank of Sang-wei. Their rank insignia is a brass bar with a single silver pip.

The CCAF Admiralty rank uses the same insignia, but is named Kong-sang-wei.

CCAF Military Rank

Sang-wei Kong-sang-wei (Captain)

Free Worlds League

Like their counterparts in other Successor States, FWLM Captains are company commanders. They use two thick gold bars on a purple background as their rank insignia.

FWLM Captain's Military Rank Insignia

Rank	Insignia
Captain

The Clans

Star Captain is the rank used by the Clans for the commanding officer of a Binary or Trinary. Commanders of DropShips and JumpShips are also given the rank of Star Captain. Clan Hell's Horses also uses the rank of Nova Captain, who commands a Supernova.

Clan Blood Spirit

Clan Blood Spirit Military Rank Insignia

Rank	Insignia
Star Captain

Clan Fire Mandrill

Clan Fire Mandrill Rank Insignia by service branch

Rank	MechWarrior	AeroSpace Fighter	Elemental
Star Captain

Clan Star Adder

Clan Star Adder Rank Insignia by service branch

Rank	MechWarrior	AeroSpace Fighter	Elemental	Naval Crew
Star Captain

Clan Wolf / Clan Wolf-in-Exile

Clan Wolf/Clan Wolf-in-Exile Military Rank Insignia

Rank	Insignia
Star Captain

Free Rasalhague Republic

In the KungsArmé officers with this rank are called Kapten, Swedish for Captain.

Periphery Powers

Magistry of Canopus

In the Magistry Armed Forces, purchasing a company command means the officer holds the rank of Commander. This rank is also used by the Magistry Navy.

Taurian Defense Force

In the TDF, company commanders use the rank of Subaltern. This should not be confused with the AFFS rank. The Taurian Defense Force Navy uses Air Master, Junior Grade or Air Master, JG for officers at this rank.

Marian Hegemony

With the interest the Hegemony Armed Forces have in recreating the Roman Empire, company commanders are known as Principes, a Latin word meaning leader or ruler. (To avoid annoying the Imperator, the latter translation isn't used.)

Outworlds Alliance

In the Alliance Military Corps, company commanders are known as Section Leaders.