The development of terrorism has been progressively characterized by the involvement of children. In the continuous and dynamic evolution of terrorist organizations, child exploitation has come to represent a fast-evolving operational, strategic and tactical component of Salafi-jihadism and emerged as one core overarching pattern in the rise of extremism, globally. In 4th Generation Warfare, the escalating nature of this phenomenon and its widening scope bring into consideration questions as to whether the exploitation of children in terrorist ranks is a mere aberration or an indication of the evolution of warfare and its changing requirements. As part of the ongoing effort to understand the causes, motivations and factors driving the accelerating nature and protracted dimension of child exploitation in terrorism, the ambition of this article is twofold: To investigate the causal complexities between the recruitment and use of children as part of Salafi-jihadist´s groups strategy of war and the tenets of 4th Generation Warfare; To provide new theoretical insights into the phenomenology of child exploitation in terrorism.