Question: James Calhoun was the brother-in-law of a soldier who was brevetted to brigadier general at what age?
Sentence (from "George Armstrong Custer"): At the conclusion of the Appomattox Campaign, in which he and his troops played a decisive role, Custer was present at General Robert E. Lee's surrender to General Ulysses S. Grant, on April 9, 1865.
Relevant evidence: No