John R Cain was a resident of Fremont County, Iowa, when he enlisted as a Private Dec. 24, 1863 at the age of 25 years. He mustered in Co A 4th Iowa Cavalry Jan. 19, 1864 and mustered out Aug. 8, 1865 at Atlanta, Georgia.
Cain applied for his pension in Colorado Aug. 29, 1890. App #962,957 and Cert #804,623. His wife, Samantha Jane "Jennie" Smith, applied for her widow's pension in Colorado on July 7, 1897. App #658,100 and Cert #523,952.