Born in Portugal, John DeValles immigrated with his family to the United States in 1880, making their home in New Bedford, Massachusetts, where he attended local schools. He played the violin and spoke six different languages fluently. After seminary, he was ordained a Catholic Priest in 1906. He first served at Our Lady Of Mount Carmel, then Saint John The Baptist Church. He also founded the first Portuguese parochial school at Espirito Santo Church in Fall River, Massachusetts. He received permission to become a Chaplin for the Knights Of Columbus Chaplin’s Corps, and in 1917 was commissioned in the U.S. Army as a chaplain. Accounts of his ministry to both Allied and German soldiers were widely published, and he received honors from both the French and United States governments before his death in 1920, of complications from his wartime wounds.