Military uniforms Kulm and Breslau

Hello fellow researchers,
A family member scanned four old photographs she found. They show a man in
military uniforms from Kulm (near Torun) and Breslau. Would anyone like me
to forward these photos to you? We are trying to identify which branch of
the service this family member served in.
Best regards,
James Sternitzky
Wisconsin, USA

Researching: Sternitzky, Sternitzke