 In 1927 , territorial titles were adopted by the units of the Citizens Force , and as a result the battalion adopted the title of the " South Australian Regiment " . It also adopted the motto of " Primus inter Pares " , meaning " First Among Equals " . The following year , 1928 , the battalion formed an alliance with the Royal Inniskilling Fusiliers , which were also known as the 27th Regiment of Foot . A year later , following the election of the Scullin Labor government , the compulsory training scheme was abolished and in its place a new system was introduced whereby the Citizens Forces would be maintained on a part @-@ time , voluntary basis only . It was also renamed the " Militia " at this time . The decision to suspend compulsory training , coupled with the economic downturn of the Great Depression meant that the manpower of many Militia units dropped considerably and as a result the decision was made to amalgamate a number of units . The 27th Battalion , however , did not suffer this fate and in 1938 it adopted the territorial title of " South Australian Scottish Regiment " and was afforded the right to wear the MacKenzie tartan , after forming an alliance with the Seaforth Highlanders . At the same time it also raised a pipe band . 
