Armed conflict devastates children across all regions and ideologies – inflicting profound and lasting harm on their bodies, minds, and developmental trajectories. While all sides may commit atrocities, the experience of children is tragically consistent: they are the least responsible, yet often the most harmed. This article traces the evolving global understanding of war’s impact on children, charting a journey in modern history to present-day realities. It begins with the landmark 1996 UN report by Graça Machel, which exposed the wide-ranging and systematic nature of the effects of war on children – where violence, displacement, and severed attachments force children into premature adulthood. Building on this, the 2009 and 2013 UN efforts codified the “Six Grave Violations” against children in armed conflict, now central to global monitoring and advocacy. Despite these frameworks and legal protections, including the Convention on the Rights of the Child, the 2024 UN Secretary-General’s report shows violations have surged – up 21% in the past year alone. To bring these patterns into focus, the article concludes with a case study of Gaza. Chosen for its immediacy and visibility, Gaza is emblematic of the ongoing failure to shield children from war’s worst impacts. Similar suffering persists in Sudan, Myanmar, and Ukraine. The article calls for an urgent, universal imperative: end hostilities to protect children. A trauma-informed, attachment-sensitive approach – grounded in lessons from Rwanda, Bosnia, and Syria – is essential. Clinicians, humanitarians, and policymakers must place children at the heart of all post-conflict recovery and accountability efforts.