McDonald’s began selling Mighty Wings in the United States in 1990.
Mighty Wings were McDonald’s attempt to bring bone-in, spicy chicken wings into its U.S. menu. Unlike the sauced, usually unbreaded Buffalo-wing tradition, the product was associated with a seasoned, crisp coating and was sold as a fast-food side or snack.
The item did not become a permanent flagship product. McDonald’s eventually removed it from the U.S. menu, then brought Mighty Wings back nationally in 2013 for a limited run. The later revival attracted attention partly because many customers remembered the original 1990s item.
Mighty Wings should not be confused with every chicken-wing product sold by McDonald’s internationally. Menu names, coatings, and availability have varied by country and period. The question specifically refers to the U.S. launch of the Mighty Wings name.