The deformation behaviour of aluminium alloy (AA) 7075 at low strain rates (ranging between 1x10^-5 and 10 s^-1) has been widely investigated in the literature. Whereas only a few studies have explored the behaviour of the material during deformation at high strain rates (in the order of 10³ s^-1) and elevated temperatures, which are quite important for practical situations, for example, in defence technologies and manufacturing processes, that involve extreme conditions of deformation rate and thermal gradient. Therefore, the current research focuses on the mechanical behaviour and microstructure evolution in AA7075-T651 under dynamic loading conditions. Cylindrical samples of AA7075-T651 were compressed at strain rates between 1400 and 5300 s^-1 using a Split-Hopkinson pressure bars setup at room temperature, 200, 300 and 400 °C. The pre- and post-deformation microstructure were investigated using optical and scanning electron microscopes, which depicted the formation and growth of adiabatic shear bands (ASBs) and/or cracks at elevated temperatures. This microstructure evolution was then correlated to the deformation temperature and the mechanical response. Furthermore, a deformation path starting from the initial microstructure leading to the final fracture of the material through the evolution of ASBs and cracks was established.