This is what I have located so far.

This is a list of men who lived in Okmulgee County, Oklahoma during World War I. The men in this list enlisted in Okmulgee County, Oklahoma. These names are from Louisiana.

I would start with John Guidry, born Oct. 25, 1879

John Guidry 25 Oct 1879 Black
Alfred Guillory 09 Jan 1885 Black
Andrew Guillory 12 Aug 1895 Colored
Arthur Guillory 04 Jun 1873 Black
Henry Guillory 15 Feb 1896 African
Sylvester Guillory 30 Dec 1884 Black
Theodore Guillory 15 Jan 1884 Colored
Clarence A Guillot 10 Oct 1886 Black
Percy Alva Guillot 06 Nov 1900 Black
Pinkney Guillot 19 Dec 1892 Black

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This is possible the John Guidry that migrated to Okmulgee County, Oklahoma.

1900 United States Federal Census

Name: John Guidry
Home in 1900: Police Jury Ward 1, Saint Landry, Louisiana
Age: 27
Estimated birth year: abt 1873
Birthplace: Louisiana
Relationship to head-of-house: Head
Spouse's name: Adline
Race: Black
Occupation: View image
Neighbors: View others on page
Household Members: Name Age
John Guidry 27
Adline Guidry 30
Rosa Guidry 6
Rosillia Guidry 4
Mary Guidry 2

Harrison Thomas LaTour
LaTour Genealogical Collection