Possible Clues:

• Congo's alternate name
• Congo's one-time name
• Site of Ali's Rumble in the Jungle
• Congo, from 1971 to 1997
• African state, achieved independence from Belgium in 1960
• Former African country
• Where Ali dethroned Foreman
• Old country name or its currency, both dropped in 1997
• The Congolese franc replaced it
• Old name for the Congo