Callisto

Callisto is a moon of Jupiter in the Sol system and a human colony. With little population to speak of, Callisto's purpose to the Unified Earth Government is primarily militaristic in nature; the moon's several UNSC bases are capable of launching their units and ships within an hour's notice.

Overview
The moon is 99 percent the size Mercury, but only a third of the mass. While devoid of an atmosphere, ice formed on the moon.

Early history
Callisto was originally discovered by Galileo. Joint efforts by Earth's national governments to colonize Callisto, along with the other Jovian Moons, were underway by 2080. In 2170, Callisto was the site of the signing of the Callisto Treaty which officially ended the Interplanetary War. Callisto also eventually became the site of a UNSC naval depot.

26th-century
Colonel Herzog claimed to have to deal with paperwork regarding surveillance here.

Trivia
Callisto is named after the Greek mythological figure of the same name.

List of appearances

 * i love bees
 * Halo Mythos