3-54. ARCYBER is the Army headquarters responsible for cyberspace operations to support joint requirements. It is the single point of contact for reporting and assessing Army cyberspace incidents, events, and operations in Army networks, and for synchronizing and integrating Army responses. When directed, ARCYBER conducts offensive and defensive cyberspace operations to ensure unified action partner freedom of action in cyberspace, and to deny it to adversaries. ARCYBER provides appropriate interactions, both as a supported and as a supporting command to Army Service component commands (ASCCs), including theater armies, Army commands, direct reporting units, and unified action partners. ARCYBER plans, coordinates, synchronizes, and directs an integrated defense within the Department of Defense information network-Army (DODIN-A) and, when directed, other portions of the Department of Defense information network (DODIN). ARCYBER is responsible for supporting joint information operations missions through operational control of the 1st Information Operations Command (Land).