 No.1 Squadron received the RAAF's first three CAC Wirraways on 10 July 1939.As the likelihood of war increased, the squadron's role was altered to incorporate reconnaissance as well as bombing, resulting in the transfer out of all Demons and Wirraways and the transfer in from other units of nine Avro Ansons on 28–29 August 1939; at the end of the month its personnel comprised nine officers and 122 airmen.