Question: In which battle did the Uncle of Henry Armstrong Reed and youngest brother of a US Army Lt Colonel and a two-time Medal of Honor Recipient get killed along with his brothers and his nephew? 
Sentence (from "Boston Custer"): Boston Custer (October 31, 1848 – June 25, 1876) was the youngest brother of U.S. Army Lt Colonel George Armstrong Custer and two-time Medal of Honor recipient Captain Thomas Custer.
Relevant evidence: Yes