Sentence:  For Pennsylvania yields to no State in the courage and virility of her sons&mdash;plain, <WSD>unhyphenated</WSD> Americans, not yet pushed by invaders off the soil; loyal men, whose fathers gave their blood like water for the Union. 
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.