This is the Secretary of Defence and Chief of the Defence Force’s performance report to the Minister for Defence, the Parliament of Australia and the Australian public for the 2017–18 financial year. The report addresses the purposes and outcomes of the Department of Defence, including the Australian Defence Force—collectively known as Defence. The report relates to Defence’s performance for the period 1 July 2017 to 30 June 2018 and is the department’s primary mechanism of accountability to the Parliament of Australia. The report was prepared in accordance with parliamentary reporting and legislative requirements. Appendix C of this report identifies for the reader where required information may be found.