Vietnam Veterans’ Day, also known as Long Tan Day, is observed in Australia every August 18 to commemorate the Battle of Long Tan, which occurred on August 18, 1966, during the Vietnam War. This battle was significant as it involved a small contingent of over a hundred Australian soldiers successfully defending against approximately 2,500 North Vietnamese and Viet Cong troops in Phuoc Tuy Province. The Australian forces achieved a decisive victory, suffering only 18 casualties, making it the largest single unit battle fought by Australian troops in the conflict. The day serves to honor the contributions of Australian military personnel in maintaining peace in South Vietnam and is marked by various commemorative events throughout the country.