U.S. Cyber Command is a unified military command within the United States Department of Defense, established to strengthen the nation's ability to defend its military networks and conduct cyber operations. Its primary mission is to protect U.S. military systems from cyber threats, coordinate offensive and defensive cyber activities, and support national objectives in cyberspace. U.S. Cyber Command works closely with other government agencies and international partners to counter cyberattacks, deter adversaries, and ensure the security of critical military infrastructure.