Now that most countries are taking energy transition more seriously, Defence forces must also adapt their energy use accordingly. In Australia, where the energy future is still undefined while moving constantly between clean energy initiatives and renewed interest in coal, the energy transition remains to be developed. Australia will gain in developing an energy plan which will pave the way to energy transition considering the forecasted decrease of demand for coal in favour of renewable energy sources. This will imply for Australia the necessity to regain control of strategic elements of its energy network and production. It also means to keep the upper hand in energy exports and to maintain full control on its energy transition process. In prevision, the Australian Defence Forces are already preparing themselves to reduce their energy use and to design new equipment powered with a greater share of renewable energy.