Denmark, a small NATO country, is leading Arctic military exercises near Greenland amid rising tensions with Russia. In response to Russian aggression and drone incursions over the Baltic, Denmark is massively boosting defense spending to nearly €20 billion ($23 billion) over 10 years, plus billions more for air defense and long-range missiles. The aim is deterrence, not war. Denmark is shifting toward European defense systems, distancing itself from an increasingly unreliable US ally.