When Muhammad Ali was scheduled to fight George Foreman in October of 1974, the fight was coined the Rumble in the Jungle because it took place in Zaire (now called the Democratic Republic of Congo).
Sidebar: this fight was almost 50 years ago. I remember my Dad watching this fight; he was a huge Ali fan.
Ali was the underdog as he was recovering from a series of legal challenges and was not allowed to box simply because of his anti-war stance (BTW, Ali was right, the government was wrong). Muhammad Ali was also a Black man trying to make his way in this world, and boxing was his means of doing so.