He served with the 102nd Infantry in the trenches of France for 18 months. Stubby participated in four offensives, and 17 battles. He was able to detect sound, and smell from an incredible distance, so Stubby was used to warn soldiers of incoming mustard gas, and artillery attacks. On many occasions, he saved the life of multiple men. Stubby was also able to locate and comfort wounded soldiers who were separated from the group and located in no man’s land. On one occasions, he was solely responsible for capturing a German spy in the Argonne.