Z Special Unit, or Z Force (also known as Special Operations Executive (SOE), Special Operations Australia (SOA) or the Services Reconnaissance Department (SRD)), was a joint Allied special forces unit formed during the Second World War to operate behind Japanese lines in South East Asia. Predominantly Australian, Z Special Unit was a specialist reconnaissance and sabotage unit that included British, Dutch, New Zealand, Timorese and Indonesian members, predominantly operating on Borneo and the islands of the former Netherlands East Indies.