The purpose of this thesis is to investigate the interplay between the technology, tactics and organisation of the First AIF. Warfare in the twentieth warfare is characterised by the presence of certain technologies that give it a distinctive nature and which first appeared in the Great War. It was in the Great War that the highly dispersed form of tactics that we know today emerged. Thus, it is a natural starting point not only for the examination of warfare in the era of technology but for considering the nature of technological change itself. My Australian perspective enabled issues to be looked at to a depth that would not be possible in a work of this length with a broader view. I have argued that the Great War was characterised by the problem of trench warfare, and I have traced the progress of tactical, technological and organisational developments that ultimately supplied the solutions. I have also shown how the Great War was not only a war of technology in which new technologies were introduced and developed, but also one which saw the spread of new ways of thinking about military technology. In preparing this thesis, I have inspected the actual battlefields in France, Belgium and Turkey. I have drawn on a broad range of published material, but the thesis is largely based upon the primary documents found in the Australian War Memorial and Australian National Archives.