John Trout Greble

John Trout Greble
Lt. John Trout Greble
Born(1834-01-19)January 19, 1834
DiedJune 10, 1861(1861-06-10) (aged 27)
Buried
BranchUnited States Army
Service years1854–1861
RankFirst lieutenant
Unit2nd U.S. Artillery Regiment
ConflictsThird Seminole War
American Civil War
RelationsEdwin St. John Greble (son)

John Trout Greble (January 19, 1834 – June 10, 1861) was an American military officer who served in the Union army during the American Civil War. He graduated from the United States Military Academy and served in the United States Army during the Third Seminole War. He was killed in action at the Battle of Big Bethel, and was the first Regular Army officer and graduate of the United States Military Academy killed in the American Civil War.