That’s unimaginable today; we learn about those wars as though they are oceans away.
Then again, just a couple of miles from me are two sites destroyed by pro-German saboteurs during WWI - the Canadian Railway Car Co. in Lyndhurst NJ and Black Tom Island in Jersey City. Nothing remains of either site but memorial plaques.
My parents were originally from your area then. My mother grew up in Brooklyn, and my father grew up in Moonachie, New Jersey, close to Teterboro airport. Memory of the Black Tom explosion helped to prompt the internment of Japanese and other enemy aliens during WW II.