Mosaic Warfare is often seen as a far-future concept linked to further breakthroughs in emerging disruptive technologies. This article argues that the war in Ukraine challenges that view. Although Ukraine does not explicitly use the term, its battlefield adaptation reflects core mosaic principles, including distributed low-cost uncrewed systems, adaptive kill webs, decentralised decision-making, and rapid sensor-to-shooter integration. The article shows that Mosaic Warfare is not merely a speculative future vision, but an increasingly useful lens for understanding military success and effectiveness in contemporary warfare. At the same time, the Ukrainian case suggests a changing character of warfare in which operational advantage depends increasingly on adaptability, distributed force employment, and the rapid integration of sensors, decision-makers, and shooters, while also exposing current limits in interoperability, communications resilience, sustainment, and organisational scaling. »» TDHJ «« » patreon: https://www.patreon.com/thedefencehorizon » donate: https://tdhj.org/about/#donation »» HOME ««» https://tdhj.org/ »» SOCIAL MEDIA ««» X (formerly Twitter): https://x.com/HorizonDefence » Facebook: https://www.facebook.com/thedefencehorizon.org » Instagram: https://www.instagram.com/thedefencehorizonjournal/ » LinkedIn: The Defence Horizon Journal