 In April 1918 the militia artillery was again mobilised, although this time only for a month, when news that the German commerce raiders "Wolf" and "Seeadler" had entered Australian waters the previous year.In June 1918 the number of troops actively employed on home service was 9,215, of which 2,476 were regulars.At this time the Navy took over the task of providing guards for ships in harbour and communications facilities, thus allowing for many of the militia troops to be released for further training, and as such it was decided to increase the period of camp training for the militia from eight days to 24.