Operation Mount Hope III was a top secret clandestine American military operation to capture a crashed Soviet-made Mil Mi-25 "Hind-D" attack helicopter, an export model of the Soviet Mi-24. The aircraft had crashed and been abandoned in the conflict between Libya and Chad. In 1988 two U.S. MH-47 Chinooks of the 160th Special Operations Aviation Regiment flew almost 500 miles (800 km) at night to the site and retrieved the helicopter without being detected. The mission was conducted entirely within Chad, with the approval of the government of Chad.