From Halopedia, the Halo wiki
Csongrád was a location in the Highland Mountains on the human colony world Reach, home to ONI's CASTLE Base.[Note 1]
By May 8, 2551, this community was the residence of Dr. Catherine Halsey.
Fall of Reach
During the Fall of Reach, contact was lost with UNSC forces in the region.
Csongrád like many other communities on Reach, was named after a place in Hungary.
- ^ In the third Data Drop, Csongrád is mentioned as one of Dr. Halsey's two primary work sites alongside Babd Catha (SWORD Base); given that she had her permanent office in CASTLE Base, this indicates that the facility is located in Csongrád, which is also listed as Halsey's place of residence.