Homeworld:

Breen

Goverment:

- Breen Confederacy (24th Century)
- Breen Imperium (32nd Century)

Leader:

- Thot (High-ranking Military Officer)
- Emperor, later by multiple Primarks

Society:

- Warrior Race
- Married Breen scarred themselves with matching symbols on their forearms
- Culture taught that the gelatinous form was their true face

Highlights:

- An entire Klingon fleet was sent to conquer the Breen
- The fleet never returned & was never heard from again
- 2375: Joined the Dominion, attacked Earth, assaulting Starfleet Headquarters
- Made an incursion into the Delos system, occupied the planet Brekka
- In the 32nd century, the Breen remained antagonists of the Federation
- Entered a civil war over control of the throne, six primarchs lead rival factions
- Tahal occupied the planet Kellerun, their population was severely reduced