John Anthony Tesiero Sr., was an Amsterdam native, born on June 19, 1887. He was the son of Italian immigrants, Anthony and Mary Spataro Tesiero. During World War I, he was a Private in the U.S Army from June 26, 1918 until March 10, 1919. John served with the American Expeditionary Force, the A.E.F was a formation of the U.S. Army on the Western Front of World War I. John returned home from the war and married Elizabeth Marcella Crouse. They had one son, John Jr. who followed in his father's footsteps. John Jr.enlisted and served his country proudly in the U.S. Army during WWII.