He was involved in Operation Musk Ox. In 1993, this was estimated to be 40% of the world population of musk ox. Wolves use teamwork to attack herds of caribou or musk ox for food. Mastodons, Musk Ox and Caribou roamed the area. The largest of these goat antelope is the takin, a relative of the musk ox. These they filled with driftwood, musk ox dung, and bones. In 1975, the musk ox was also introduced. The keystone herbivores are the musk ox and the caribou. Operation Musk Ox was an 81-day military exercise organized by the Canadian Army in 1946. In 1990, Chandler was trampled by a musk ox in the Northwest Territories of Canada. In the spring, the native people brought him to Ellesmere Island to hunt musk ox.