The M1910 coastal defense gun was a large artillery piece developed by the United States in the early 20th century. Designed for coastal fortifications, it was capable of firing heavy shells over long distances to protect against naval threats. The gun was typically mounted on a fixed pedestal and had a caliber of 10 inches, making it effective for defending strategic locations. These guns were primarily used during World War I and World War II, serving in various coastal defense installations across the country. The M1910 was part of a broader effort to enhance the U.S. Army's coastal defenses, reflecting the military's focus on protecting vital ports and harbors from enemy attacks.