Individual Details

Henry doesn't appear in a census with his parents - seems to have been omitted - but his name may also have been William, see later. I did not know he existed until his death certificate showed up on FamilySearch.org.
Montana Death Certificate, Registers No. 171
Henry Harmon died at the Veterans Administration Facility at Fort Harrison, Lewis & Clark County, Montana on 5 Sep 1938. His residence was Chinook (Blaine Co) Montana. He was Single and his birth listed as 2 Aug 1858 in Zionville, Indiana. He died of pulmonary edema, with arteriosclerosis and myocarditis. Parents listed as William A. Harmon and Elizabeth Miller, both born in Indiana. The informant was H. C. Watts of Ft Harrison. His body was removed to the Crow Agency, Montana on Sep 8th.


He was buried Custer Natl Cemetery, Crow Agency, Big Horn, Montana.

This hospital is still open today.

I did find an enlistment record:
1881
Henry Harmon, March 31, at Indianapolis by Lt. Randall. His home was Boone Co, IN and he was age 22, a Farmer. He had Grey eyes, Black hair, dark complexion, was 5' 9 1/2" tall.
18th Infantry, Company D
Discharged March 30, 1886. Service at Fort Hays, Kansas. Private. Character Good.
Apparently this would have been for the Apache Wars.
The Apache Wars were a series of armed conflicts between the United States Army and various Apache nations fought in the southwest between 1849 and 1886, though minor hostilities continued until as late as 1924.

Master Index Card, Veterans' Administration
Henry Harmon, Private, Company D, 18th US Infantry
At Cleveland, Mont.
Born 2 Aug 1858; died 5 Sep 1938
Enlisted 31 Mar 1881; Discharged 30 Mar 1886

U.S. Army Register of Enlistments adds the following to his story
Henry enlisted at age 22, a Farmer. Discharged at expiration of service at Fort Hays, Kansas, still a Private. Character Good!

A Henry Herman is listed in the Helena, Montana, City Directory, 1890, as employed by bottler Nicholas Kessler, boards with same.

Great Falls Tribune, Great Falls, Montana, Wed., 7 Sep 1938, p.3
Henry Harman, Chinook Indian Wars Veteran Dies at Fort Harrison.
Helena, Sept 6 - Henry Harman, 80, of Chinook, a veteran of the Indian Wars of the seventies in Montana, died at Fort Harrison veterans' hospital here.
Death was due to a complication of diseases.
His body will be taken to Chinook for burial. He had no know surviving relatives.
Harman was born in Indiana in 1858. He lived at Chinook for 25 years.

US National Cemetery Interment Control Forms
Henry Harmon, private, Company D, 18th Regt, US Infantry
Custer Battlefield Natl Cemetery, Crow Agency, Montana
Died 5 Sept 1938; interment, 9 Sept 1938.
Authority QMG telegram, Discharged March 30, 1886.
State on stone (Indiana)

He has been very elusive in any census record. I have wondered if he had been married at some time - but I believe he was going by "William".

1920 Census. Chinook, Blaine Co, Montana, Hh 39
William Harmon, 65, b. IN, parents b. IN, Farmer, Homestead

Indian Wars Pension Card
Filed 17 Feb 1928
Service 1881-1886
Henry Harmon, Co. 3, 18th US Inf.
Montana

1930 Census, School Dist 14, Blaine Co, Montana, Hh 89, Boarding on the sheep farm of Henry Tellmon
William Harmon, age 72, b. IN, parents b. IN, sheep herding

30 Sep 1932. Admitted to Home for Disabled soldiers, Sawtelle, Los Angeles, California. Receiving a pension of $50.
Enlisted as a Private, 31 Mar 1881, Indianapolis, Ind. Co. D, 18th Infantry. Discharged 30 Mar 1886. Disabilities: Old fracture of rt. hip with resulting deformity and shortning with imparied function.
Age 74, Born in Boone Co, Ind. 5'10", Brown eyes, gray hair, Protestant. Single. Nearest relatives: James Harmon, Bro, Zionsville, Ind.; Lee H. Adamson, nephew, 341 Reeves Dr, Beverley Hills, Cal.

William Harmon was listed as surviving his brother James in 1933 - William was said to be "of" Los Angeles at that time.
Three William Harmons of approximate age were in the 1930 census in Los Angeles County, CA, but none were born in Indiana.
Since his brother Henry was going by the name William in Montana - AND a son William of approximate age was with the family in 1860 and not a son Henry - I very much suspect it is the SAME son and the family back East had long since lost contact.

Montana Death Certificate #1435
Henry Harmon died at the Veterams Administration Famility in Fort Harrison, Lewis & Clark County, Montana, on 5 Sep 1938 of pulmonary edema complicated by chronic myocarditis. His residence was in Chinook, Montana. He was single and no longer had an occupation. Born 2 Aug 1858 in Zionville, IN. Father given as William A. Harmon; mother, Elizabeth Miller; both born in Indiana. The informant was the Manager of the VA Facility. Buried, Crow Agency, Montana , Sep 8th.

Great Falls Tribune, Great Falls, Montana, Wed. 7 Sep 1938, p.3
Henry Harman, Chinook Indiana Wars Veteran Dies at Fort Harrison
Helena, Sept 6 - Henry Harmon, 80, of Chinook, a veteran of the Indian Wars of the seventies in Montant, died at Fort Harrison Veteran's Hospital here.
Death was due to a complecation of diseases.
His body will be taken to Chinook for Burial. He had no known surviving relatives.
Harman was born in Indiana in 1858. He lived at Chinook for 25 years.

Birth	2 Aug 1858	Zionsville, Boone County, Indiana
Death	5 Sep 1938	Fort Harrison, Lewis and Clark County, Montana

Father	WILLIAM ALEXANDER HARMON (1826 - 1881)
Mother	EMMA ELIZABETH MILLER (1825 - 1871)
Sibling	James N. "Taylor" Harmon (1848 - 1933)
Sibling	MARY ELIZABETH "Molly" HARMON (1849 - 1912)
Sibling	John A. Harmon (1852 - 1881)
Sibling	Adora Harmon (1853 - 1854)
Sibling	Charley M. HARMON (1856 - 1859)
Sibling	Minnie B. Harmon (1866 - 1946)