Many factors have been taken into account in perform¬ing this review. Among them, the emergence of new threats to defence, which obliges the Armed Forces to equip themselves with new military capabilities, or the current accelerated technological progress which, while offering opportunities for the development of more advanced systems, introduces new challenges for the future. Also of importance, in a national context, is the drawing up of a new Spanish Science, Technology and Innovation Strategy for 2021-2027, the general framework in which national RDI, including that of the defence sector, will be developed. This opens up new opportunities for the national tech¬nological fabric to strengthen its capability development. And, in an international context, the increased European support for the defence sector of recent years opens up a new landscape of opportunities that must be understood and pursued. Other factors can also be added to the foregoing, with profound implications for national production capabilities, security and global sustainability, including the disruptive changes triggered since the beginning of 2020 by the COVID 19 crisis.