Australian military history spans from the early colonial period to modern times, marked by participation in various conflicts. Key events include involvement in the Boer War, World War I, and World War II, where Australian forces gained a reputation for bravery and effectiveness. The ANZAC spirit, originating from the Gallipoli Campaign, remains a significant part of national identity. In addition to global conflicts, Australia has contributed to peacekeeping missions and humanitarian efforts. The Australian Defence Force (ADF) plays a crucial role in national security and international cooperation, reflecting the country's commitment to maintaining peace and stability in the Asia-Pacific region.