Ruwenzori National Park (formerly Queen Elizabeth National Park), along the shores of Lake Edward and Lake George on Uganda's western border, was once home to great herds of elephants, hippopotamuses, buffalo, waterbucks, topi, lions, leopards, warthogs, antelopes, and chimpanzees. In the late 1970s, the troops of Uganda's president Idi Amin, and the Tanzanian army that occupied the country after his fall, killed many elephants for their ivory and many other animals for trophies.