Sargasso

Sargasso was a colony world of the United Nations Space Command. This was the birthplace of Daisy-023.

Sargasso was a lush tropical world where humanity was able to prosper peacefully with nature. It hosted several large metropolises and therefore seems to have a substantial population.

In 2517, at least one of its citizens, Daisy, was kidnapped by Dr. Halsey as a candidate for the SPARTAN-II Program. Daisy was replaced with a flash clone to cover up her disappearance. She eventually escaped custody and returned to Sargasso to resume her civilian life, only to learn of the flash clone who had replaced her. Having lost all hope of resuming her previous life, Daisy returned to the UNSC to become a supersoldier.

Sargasso's ultimate fate in the Human-Covenant War is unknown.

Trivia
Sargasso is likely named for the Sargasso Sea a region in the middle of the North Atlantic Ocean.