From July 1861 until September 1864, Boynton served as a commissioned officer in the 35th Ohio Infantry. He was elected as the regiment's first major, but quickly rose up the ranks to become the commanding officer of the regiment and was promoted to lieutenant colonel. He led the 35th in the Battle of Chickamauga and Missionary Ridge, where he earned the Medal of Honor for his actions on November 25, 1863.
After the war
After the war he resumed civilian life. He married Helen Augusta Mason in 1871 and became a newspaper correspondent in Washington, D.C. Boynton also became the chairman of the committee that oversaw the development of the Chickamauga and Chattanooga National Military Park. In June 1898, he returned to active military service as a brigadier general during the Spanish–American War. He was discharged in April 1899.
Place and date: At Missionary Ridge, Tenn., November 25, 1863.
Entered service at: Ohio.
Born: July 22, 1835, West Stockbridge, Mass.
Date of issue: November 15, 1893.
Citation:
Led his regiment in the face of a severe fire of the enemy; was severely wounded.[3][4]