I have found this on him:
U.S. World War II Army Enlistment Records, 1938-1946
Name: Nathaniel R Emery
Birth Year: 1919
Race: White, citizen (White)
Nativity State or Country: Indiana
State: California
County or City: Santa Clara
Enlistment Date: 8 Apr 1942
Enlistment State: California
Enlistment City: San Francisco
Branch: Branch Immaterial - Warrant Officers, USA
Branch Code: Branch Immaterial - Warrant Officers, USA
Grade: Private
Grade Code: Private
Term of Enlistment: Enlistment for the duration of the War or other emergency, plus six months, subject to the discretion of the President or otherwise according to law
Component: Selectees (Enlisted Men)
Source: Civil Life
Education: 3 years of high school
Civil Occupation: Packing Case Maker (Shipping packer. )
Marital Status: Single, without depenpendts

California Death Index, 1940-1997
Name: Nathaniel Ryan Emery
Social Security #: 547260806
Sex: MALE
Birth Date: 22 Jul 1919
Birthplace: Indiana
Death Date: 4 Feb 1988
Death Place: Los Angeles
Mother's Maiden Name: Ryan

Nathaniel Ryan Emery was born in Greene county Indiana the son of Nathaniel William Emery and Emma Ryan.

of his father I was told: "Nat" Went to a military college in Danville, Va. and was in the National Guard WWI - - Was an amnesia victim of war it is said. He left his family and disappeared for right at 7 years; Emma had sought legally to declared him dead about 1925 when he suddenly returned and took his son and declared her unfit to raise him - - she had became a beautician in order to support herself and son Nathaniel C. He left with son and was never heard from again. I have found a Nathaniel William as follows:

Name: Nathaniel William Emery
Service Info.: 1ST LT US Marine Corps
Death Date: 30 Aug 1937
Interment Date: 1 Sep 1937
Cemetery: San Francisco National Cemetery
Cemetery Address: 1 Lincoln Blvd., Presidio of S.F. Presidio of San Francisco San Francisco , CA 94129
Buried At: Section Osd Site 131

Nathaniel was the son of Jonas Aden Emery and Emma N. Gainey. He had siblings Ambrose Robert Emery, Jessie May Emery married Aurthur Winton Brown, and an infant born & died 1891. Been Searching for members of this family since 1976 - this and other data on Ambrose and Jesse has come to light this past week.