Eighteen months into 鈥檚 war on Ukraine, two things seem clear. First, the war matters. After 15 years of failed Western responses to Russian aggression against Georgia and Ukraine, another failure to contain and deter Russia would have catastrophic consequences around the world.

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Defense Secretary Pete Hegseth greets Supreme Allied Commander Europe General Christopher Cavoli before the North Atlantic Council meeting of defense ministers on February 13, 2025, in Brussels, Belgium. (Omar Havana via Getty Images)