Need information on Grandfather, Earl Thomas Robertson, in WWI

Dear Ms. Ballog,

Thank you for posting your request on History Hub!

We searched the series titled Records of Cook Companies, 1918 - 1919 in the Records of the American Expeditionary Forces (World War I) (Record Group 120) and located approximately 1,500 pages of 3rd Cook Company correspondence and general orders for 1918-1919.  For access and copies of these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at archives2reference@nara.gov.

We were not able to locate specific records of a unit designated as 76th Provisional Company September Auto Replacement.

We hope this information is helpful. Best of luck with your research!