Over the past decade, interest in human enhancement has waxed and waned. The initial surge of interest and funding, driven by the US Army’s desire for a ‘Future Force Warrior’ has partly given way to the challenges of meeting operational demands abroad. However the ethical opportunities provided by soldier enhancement demand that investigation of its possibilities continue. Benefits include enhanced decision-making, improved force capability, reduced force size and lower casualty rates. These benefits — and enhancement itself — carry concomitant risks, (...) including morale issues due to tension between enhanced and unenhanced soldiers, the issues of enhanced veterans and ownership of enhanced bodies, challenges to the army’s core values and personal identity issues. A range of measures should be designed to highlight the opportunities offered by enhancement while also minimising the potential risks. This includes providing advice on which areas the army ought to demonstrate restraint in research for ethical reasons. (shrink)