Eight died during the expedition's ascent.
The South Col is a large, level saddle between Everest and Lhotse at 26,000 feet (7928 m), often used as the highest base camp on the southern route, 3,000 feet below the summit. The southern route is the one Jon Krakauer took in May 1996, documented in the book "Into Thin Air". The South Col is the place where Beck Weathers wandered frozen and left for dead. At the base of the Lhotse face is the Khumbu Glacier. Its upper end is constantly pulling away from the Lhotse face leaving a bergschrund, a crevasse formed by a glacier's falling away from the supporting rock.
Many have died by falling down this precipitous wall.