Well...I'm just in my early 40s but back in 1978 there is a similar movie called "The Wild Geese".

It shares the same recipe of an all-star lineup playing mercenaries.

The difference is the bad guys are Latinos not Africans, the object of the rescue is a woman not a political figure. Therefore, the plot is not business but rather personal.

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"The Wild Geese", by the way, stars British stalwarts Richard Burton, Richard Harris, roger Moore, among others.