Reddish was commissioned into the Second Australian Imperial Force with the service number NX105 on 26 March 1940 and returned to the Citizens Military Force on 15 October 1945. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Reddish was awarded the Distinguished Service Order (DSO) for leadership during the Syria<unk>Lebanon campaign. As lieutenant colonel he led his regiment against the Japanese in the New Guinea campaign, fighting in the
Owen Stanley Ranges. He also took part in the Salamaua<unk>Lae and Finschhafen actions. He also took part in the Salamaua<unk>Lae and Finschhafen actions. Along with the DSO, he was twice Mentioned in Despatches.<unk> Along with the DSO, he was twice Mentioned in Despatches. Reddish was promoted to temporary lieutenant colonel on 15 April 1942 (made substantive on 1 September) and to colonel (temporary brigadier) on 17 November 1943. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ <unk> <unk> <unk>