He was a commander of the Grand Army of the Republic (GAR), and he was the only African American to hold that position.

[1] Wolff was the first African American admitted to practice law in the federal courts in Maryland.

[5] The other founding partners included Edwin Garrison Walker, and Edward Everett Brown.

[3] In 1899, Wolff became a commander of the Grand Army of the Republic (GAR) a fraternal organization of Civil War veterans, at Francis Washburn Post 92 in Brighton neighborhood of Boston.

[3] Wolff died of hypertrophy of the prostate on May 3, 1913, in Massachusetts General Hospital in Boston, and was buried at Ridgelawn Cemetery in Watertown.