an SF group has consisted of three battalions, but since the Department of Defense has authorized the 1st Special Forces Command to increase its authorized strength by one third, a fourth battalion was activated in each active component group. A Special Forces group is historically assigned to a Unified Combatant Command or a theater of operations. The Special Forces Operational Detachment C or C-detachment (SFODC) is responsible for a theater or a major subcomponent, which can provide command and control of up to 18 SFODAs, three SFODB, or a mixture of the two. Subordinate to it is the Special Forces Operational Detachment Bs or B-detachments (SFODB), which can provide command and control for six SFODAs. Further subordinate, the SFODAs typically raise company- to battalion-sized units when on unconventional warfare missions. They can form six-man "split A" detachments that are often used for special reconnaissance. Battalion Headquarters Element – SF Operational Detachment-C (SFODC) composition The SFODC, or "C-Team", is the headquarters element of a Special Forces battalion. As such, it is a command and control unit with operations, training, signals, and logistic support responsibilities to its three subordinate line companies. A lieutenant colonel commands the battalion as well as the C-Team, and the Battalion Command Sergeant Major is the senior NCO of the battalion and the C-Team. There are an additional 20–30 SF personnel who fill key positions in operations, logistics, intelligence, communications, and medical. A Special Forces battalion usually consists of four companies: "A", "B", "C", and Headquarters/Support. Company Headquarters Element – SF Operational Detachment-B (SFODB) composition The ODB, or "B-Team", is the headquarters element of a Special Forces company, and it is usually composed of 11–13 soldiers. While the A-team typically conducts direct operations, the purpose of the B-Team is to support the company's A-Teams both in garrison and in the field. The B-Teams are numbered similarly to A-Teams (see below), but the fourth number in the sequence is a 0. For example, ODB 5210 would be 5th Special Forces Group, 2nd Battalion, A Company's ODB. When deployed, in line with their support role, B-Teams are usually found in more secure rear areas. However, under some circumstances a B-Team will deploy into a hostile area, usually to coordinate the activities of multiple A-Teams. The ODB is led by an 18A, usually a major, who is the company commander (CO). The CO is assisted by his company executive officer (XO),