Any Info. on Co H Erie Co/112th.M.G. need MORE !!!

Hello everybody !!! Not really sure what i'm looking for,the 112th M.G. batt. appears to be made  from Erie COUNTY part of the 28th.div.(Keystone/red)i beleive they MAY have saw action in WW1  but am not sure,my pictures are from 1921 3 yrs.post WW1.It may be hard to tell but i wonder if any of these guys(in pics)saw action? and was the 112th.made up from erie,pa.&erie county men.ANY help will be greatly appreciated ! HH ALL !!! ,