The US Army Corps of Engineers (USACE) is a federal agency under the Department of Defense that provides engineering services to the nation. Established in 1775, it plays a crucial role in civil works, military construction, and environmental protection. The agency is responsible for managing waterways, flood control, and infrastructure projects across the United States. USACE also engages in disaster response and recovery efforts, helping communities rebuild after natural disasters. Its work includes maintaining navigation channels, constructing dams, and restoring ecosystems, making it vital for both national security and public safety.