Galusha Pennypacker (June 1, 1844 – October 1, 1916) was a Union general during the American Civil War. He is to this day the youngest person to hold the rank of brigadier general in the U.S. Army; at the age of 20, he remains the only general too young to vote for the president who appointed him.
Read more about Galusha Pennypacker: Early Life, Military Career