From Halopedia, the Halo wiki
Target Area Apache was a location as designated by the UNSC on the world of Pegasi Delta. The area was scarred by impact craters and covered in red rocks. The area was located five kilometers away from the Covenant fuel refinery located on the moon. Seas that were rich in tritium and deuterium were found around the location. In 2545, Tom-B292 was dropped into this area as part of Operation: TORPEDO. The area was guarded by several Kig-Yar, until they were killed by the Spartan-IIIs of Beta Company.