As climate change reshapes the global landscape, its impact is vast not just in its effect on the environment but also politics, economics and security. For European militaries, climate change is a “threat multiplier”, intensifying resource competition, migration as well as instability. From extreme weather disrupting operations to the growing demand for disaster relief, armed forces need to adapt to new challenges. This paper investigates how European military strategies are evolving in order to combat climate related threats, assessing the implications for national security and NATO’s collective defence. The future of defence is climate conscious- are we ready?