The European Union’s deepening crisis is examined at a decisive juncture in its post-Cold War evolution. Unlike previous challenges mainly shaped by external threats, the EU’s current predicament is primarily self-inflicted, driven by internal fragmentation, strategic incoherence, and geopolitical miscalculations. It is argued that central to this crisis is the EU’s wavering commitment to Ukraine, where initial declarations of enduring support have yielded to strategic drift and the absence of a coherent post-war vision. This internal discord is compounded by external pressures, particularly the recalibration of US foreign policy under Trump’s second-term presidency. This has exposed Europe’s enduring security dependency and undermined ambitions for strategic autonomy. Against this background, the chapter argues that the erosion of early unity among EU member states, divided between Western economic caution and Eastern security urgency, has left the EU militarily underprepared, economically vulnerable, and diplomatically marginalised. In the face of mounting internal discord and external pressures, the EU must urgently reconcile its strategic disarray or risk becoming irrelevant globally.