Well I found him in the 1910 census as Charley Moschero age 20 b. Italy single, a coal miner listed as a Boarder and living in Clinton Twsp, Vermillion County, Indiana. has immigrated 1906. His WWI record may be in the 20% that survived the 1973 fire at the NARA so you should still try there. www.archives.gov
"Last Name:MOSCHERO First Name: Charles Age: 29 Occupation: County: Vermillion Family: Son of Mr. & Mrs. Joe Moschero; born Aug. 23, 1889, Canische, Italy. Came to U.S., and resided in Vermillion County, Ind. eight years. Living in Lehigh, Mont., when he entered service Service: Army Company: Co. K, 16th Infantry, 1st Div. Division: 1 Rank: Private Merit: Comments: Overseas in Dec., 1917. Killed in action July 19, 1918, battle of Soissons. Enlistment: Discharge: Date not listed Location: Overseas Battles: KIA: Soissons Burial: Buried "Somewhere in France." Source 1"
ABMC Burial Information for Charles Moschero http://www.abmc.gov/search/detailwhttp://www.abmc.gov/search/detailw. "Entered the Service from: Montana Died: July 19, 1918 Buried at: Plot A Row 31 Grave 29 Oise-Aisne American Cemetery Fere-en-Tardenois, France"