For weeks before Russia’s invasion of Ukraine, John J. Sullivan, the U.S. ambassador in Moscow, was warning that it would happen. When troops finally crossed the border, he was woken in the middle of the night with a prearranged code. The war had begun, and the world would never be the same. Sullivan leads readers into the offices of the U.S. embassy and the halls of the Kremlin during this climactic period—among the most dangerous since World War II. He shows how the Putin regime repeatedly lied about its intentions to invade Ukraine in the weeks leading up to the attack. And he explains how, when Putin ultimately gave the order to launch a full-scale invasion of Ukraine on February 24, 2022, he proved that Russia was not just at war with its neighbor: it was also at war, in a very real sense, with the United States, and with everything that it represents.