Sentence:  The color barriers in superhero comic books began to fall in 1969 when Marvel Comics introduced the Falcon, the first African-American superhero (the Black Panther, an <WSD>unhyphenated</WSD> African superhero preceded him three years prior) in "Captain America" #117. 
Meaning of the word marked with <WSD> tags:  Of people, belonging to a single ethnicity or nationality: names for multi-ethnic/multi-nationality groups generally require a hyphen to connect the names being combined.