Newsday has taken the alphabetical list of World War I dead as assembled by volunteers at the New York State Military Museum and made it more searchable by community, linked here. Entering community names Seaford, Massapequa, Wantagh, Bellmore, and Merrick comes up with no names. The list for Hempstead shows eight, but it is ambiguous whether it is Town or Village of Hempstead. As Baldwin is unincorporated, but listed with six losses, I surmise that communities with "no names" did not suffer deaths. The lists show how, in combat, illnesses also could be fatal.
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Many thanks to all who served.