An kafa Tarayyar Babban Birnin Tarayya (daga baya aka sake masa suna Babban Birnin Ostiraliya) a 1911 a matsayin wurin zama na babban birnin tarayya na Canberra. Melbourne ita ce wurin zama na wucin gadi na gwamnati daga 1901 zuwa 1927 yayin da ake gina Canberra. An sauya yankin Arewa daga ikon gwamnatin Kudancin Ostiraliya zuwa majalisar tarayya a 1911. A shekara ta 1914, Ostiraliya ta shiga Birtaniya a yakin duniya na farko, tare da goyon bayan Jam'iyyar Liberal Party na Commonwealth da kuma Jam'iyyar Australian Labor Party mai shigowa. 'Yan Australia sun shiga cikin manyan batutuwan da suka yi yaƙi a kan Front Front.
Yammacin Yamma