I recently found out my Great Grandfather was in WWI and the Mexican Pundative Expedition in the 4th Ohio National Guard and then mustered as the 166th in the 42nd.
I am interesting in finding out more about him, collecting 42nd/166th Co G and 77th/308th C B.
I am specifically collecting panoramic unit photos of both units. I've found unit photos of the 166th taken in 1919
The 4th Ohio National Guard unit in Camp Pershing 1917 I have the link and emailed the seller but he was unable to give me more details except he sells items