The previous definitions of war have become outdated and several theories claim their place in the theoretical debate of the future wars. One of them, Hybrid Warfare have had a great impact and are now being incorporated into doctrine by several nations and military organizations, even though the theory is criticized. This thesis aims to clarify the discussion surrounding this theory and at the same time make a contribution to the theoretical debate. By extracting key signatures of Hybrid Warfare and testing them on the Russian intervention in the Ukraine and the Crimea the thesis seeks to answer if this conflict really is a case of Hybrid Warfare, as it is portrayed. The theoretical debate is the main focus of the thesis and the case study of the Ukraine concludes that evidence within the conflict categorizes it as a case of Hoffman´s Hybrid Warfare. The later chapters argue that these findings strengthen the debate in favour of Hoffman´s theory and ads another empirical factor to the discussion of the understanding of future conflict. Ended by thoughts of how the results can affect the future of the military profession.