How do identify my great great grandfather's division/army/battles he's fought in by his photo from 1914?

by attraxion

I have a photo from 1914 of him posing.
Short story. I know he's fought in The Great War. He was Polish guy named Franciszek Szymborowski. He fought for Kaiser. Lived in Pomorze which was under Prussian influence due to Poland Partitions.
Is this possible to somehow identify more information about him? I think his uniform is 100% legit but the Mosin couldn't be his because German soldiers used G98. Maybe photo was taken before him being sent to camp or frontline.

I am sorry if this isn't proper subreddit for such questions but I have nowhere to ask. My family doesn't know much more about him. It's the only photo I have.

jschooltiger

Hello there! As your question is related to looking for identification/information regarding military personnel, our Guide on Military Identification may be of use to you. It provides a number of different resources, including how to request service records from a number of national agencies around the world, as well as graphical aids to assist in deciphering rank, unit, and other forms of badges or insignia. While the users here may still be able to lend you more assistance, hopefully this will provide a good place to start!