Ukraine war threatens to become regional conflict, European leaders warn

# Analysis The prospect of the Ukraine conflict expanding into a broader regional war represents a fundamental shift in the security calculus for Europe and NATO. If Russia successfully pulls neighboring countries into active combat—whether through direct invasion, proxy forces, or escalating border skirmishes—NATO members like Poland and the Baltic states could invoke Article 5, obligating the entire alliance to military defense and potentially triggering direct U.S.-Russia military engagement. Such escalation would dramatically increase defense spending across Europe, disrupt already fragile energy and food supplies, and force millions more into displacement, while creating genuine risks of nuclear-armed powers in armed conflict. For businesses, investors, and civilians across the continent, a regional conflict means the difference between a localized war with managed economic consequences and a continental crisis that could reshape borders, military alliances, and the global order for decades.