US Cyber Command is a unified command of the United States Department of Defense responsible for defending the nation against cyber threats. Established in 2010, its primary mission is to protect military networks and ensure the security of critical infrastructure from cyber attacks. The command also conducts offensive cyber operations to deter adversaries and support national security objectives. It collaborates with other government agencies, such as the Department of Homeland Security, and works closely with international partners to enhance global cyber defense capabilities.