United States Cyber Command (USCYBERCOM or CYBERCOM) is the functional combatant command responsible for United States military operations in cyberspace. Cyber Command is headquartered in Fort George G. Meade, Maryland, sharing leadership, personnel, and resources with the National Security Agency and Central Security Service. Cyber Command was established on 21 May 2010 as a sub-unified command under United States Strategic Command, becoming an independent combatant command on 4 May 2018. Cyber Command traces its history through Strategic Command's Joint Functional Component Command – Network Warfare, Joint Task Force – Global Network Operations, Joint Task Force–Computer Network Operations, to Space Command's Joint Task Force–Computer Network Defense on 1 December 1998. Prior to the establishment of Cyber Command, cyber operations were the responsibility of Strategic Command, and before that Space Command. Cyber Command supports the other combatant commands by providing Joint Force Headquarters–Cyber elements.