From Halopedia, the Halo wiki
Galileo II is the intended designation for a new permanent UNSC research base. After the loss of Galileo Base during the Requiem Campaign, the UNSC Infinity was tasked on a survey mission to scout possible sites suitable for establishing the successor facility. Following an attack on the colony of Oban, Dr. Henry Glassman was to lead a survey team with a security escort to a possible site. While on course to the potential location, Infinity became trapped in the Aktis system when its slipspace coordinates were jammed by Catherine Halsey.
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