John McLennon (c. 1855–May 14, 1888) was a United States Army musician who was awarded the Medal of Honor for his actions at the Battle of the Big Hole in Montana in 1877.
[3] One of McLennon's brothers-in-law, Patrick Rogan, served with him in Company A and was also awarded a Medal of Honor for their actions at the Battle of the Big Hole.
Another of his sisters married Mildon Wilson, another United States Army soldier from the 7th Infantry who also secured the medal of Honor for his activity during the Indian Wars.
[3][4] In September 1871, McLennon enlisted in the Army at Fort Ellis, Montana Territory.
Later, McLennon became a sergeant and stayed with the infantry until he died from a kidney inflammation on May 14, 1888, participating in many battles against Indians during his career.