Help finding Naturalization docs
My grandfather came from Italy to New York, and family lore says he got US citizenship between 1920 and 1927...but I don't know why my mother thinks that since I've utterly failed in finding any record of citizenship. I know he voted, and his wife was naturalized in 1947. He also was in the Italian military in WW!, so that might have been an issue (US and Italy were not on the same side). Where can I look? He's Louis Tomasini, born in 1898, and he lived in North Tonawanda New York. I suspect the process would have been in Buffalo, since it's a nearby larger city.
I'm doing much better finding records for family members farther back...why is Grandpa's record so hard for me? Thanks for any help you can offer!