By Defence Transformation (DT), we mean major and long lasting changes to the structure, functioning and ethos of the defence sector of a country. DT is therefore more extensive than simple incremental improvement to a country’s defence sector, such as happens all over the world. It also typically occurs after a major political conflict or crisis, usually involving violence, and often on a large scale. DT is thus more ambitious than the reorganisation of defence sectors following peaceful transitions, such as those in Eastern Europe after 1989. DT should be viewed as a component of a whole security and justice transformation process.