For former CIA chief David Petraeus, the Russian leader has miscalculated — big time. The Russian president shook the tree, and what came out is NATO unity — exactly the opposite of what he was counting on.

"Putin has managed to unite NATO in a way that nothing else has since the end of the Cold War, other than his annexation of Crimea and invasion of the Donbas in 2014," he explains. "He has really given NATO a reason to live again."

What's more, Petraeus thinks Putin is now digesting the "porcupine" he's eaten, which won't go down easily.

Watch the GZERO World episode: Ukraine War: Has Putin overplayed his hand?

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U.S. Army soldiers take part in a U.S.-South Korea joint river-crossing exercise, which is a part of the annual Freedom Shield joint military training, near the demilitarized zone separating South and North Korea, in Yeoncheon, South Korea, March 14, 2026.
REUTERS/Kim Soo-hyeon

The decision deals a blow to a decades-old alliance: South Korea relies heavily on US deterrence against its nuclear-armed northern neighbor and hosts 28,500 American troops.

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Russia may be on the back foot in the war, but life near Ukraine’s front lines remains brutal. On GZERO World, David Miliband talks about the human cost of war and why winning on the battlefield means nothing if Ukraine can’t sustain its people.