Hybrid warfare in the twenty-first century is characterized by a multitude of terms that often remain undefined. German military documents do not use the term strategic communication uniformly and do not define it either. In contrast, the US military understands Strategic Communication as a holistic approach that uses various means to support American interests. The British military defines Strategic Communication as a means to promote national interests. The definition of the term narrative varies between documents. While the US military does not define it, it is defined in British documents as a story that provides an emotional justification for a political goal. NATO defines the term information environment as an environment consisting of individuals, organizations, and systems that collect, process, and disseminate information. The study shows that definitions of Strategic Communication, narrative, and information environment vary between documents. This can lead to misunderstandings and difficulties in analyzing and evaluating data. The integration of AI into Strategic Communication is also an important aspect that is not adequately considered in the documents.