Task Force 141's operators are drawn from the special operations forces of Australia, Canada, the United Kingdom, and the United States, although the majority of its operators appear to be either American or British. The specific units that contribute operators to Task Force 141 are unknown. However, it is likely that American operators are drawn from the various USSOCOM units, and Joseph Allen is known to have originated from the 75th Ranger Regiment. Likewise, British operators are known to come from the Special Air Service and likely the Special Boat Service as well. Operators from Canada and Australia are most likely drawn from the Canadian Spec Ops Regiment, Joint Task Force 2 and other commando units form CANSOFCOM and the Australian Special Air Service Regiment, respectively.