Dac or Mon Calamari, is the homeworld to the Mon Calamari species, and the Quarren species.
Dac was inhabited by the Mon Calamari, and the Quarren.
The Quarren nearly went extinct after the Mon Calamari won a war in 4,500 BBY, but the remainders were raised by the Mon Calamari.
The Galactic Republic made first contact with the planet in 4,166 BBY.
Around 532, and 529 BBY, many Mon Calamari and Quarren natives were taken as laborers to Lamaredd.
In 42 BBY, a short conflict known as the Quarren War was fought. It is unknown who won the war, but a Mon Calamari named Merai became a Commander after heroism during the war.
A Quarren named Tikkes represented the planet in the Galactic Senate of the Republic. After he was exposed of allowing slavers in the Calamari Sector, he joined the Separatist movement to free Dac from the Republic. However, only the Quarrens wanted to leave, while the Mon Calamari wished to stay.
In 21 BBY during the Clone Wars, Separatist leader Count Dooku unleashed his Dark Reaper on the planet, nearly destroying it. Later, the Quarren Isolation League tried overthrowing the Mon Calamari, but they were destroyed by Clone Troopers led by Kit Fisto.
Commander Merai and many other Mon Calamari joined the Separatists, and helped in the First Battle of Kamino, but were betrayed by Dooku, and lost. Merai sacrificed himself, so that his remaining troops could escape.