The intersection of Dorchester Avenue, East Street and Freeport Street was designated a Hero Square for Dennis J. Callahan.
https://www.cityofboston.gov/veterans/herosquares/view.aspx?id=114
Dennis Callahan lived at 6 Conrad Street. He went overseas with a machine gun unit and was killed in November 1918. He was attached to A Co., 102d Engineers. He was killed while engage with comrades in penetrating the Hindenburg line.