In December 1941, Churchill spent a weekend at Chequers with guests including Averell Harriman, Pamela Harriman, Kathy Harriman, and U.S. ambassador John Winant. Churchill was in a low mood when a BBC news broadcast abruptly reported that Japanese aircraft had attacked Pearl Harbor. After initial confusion over what had been said, Churchill instantly grasped the importance of the news, declared that Britain would go to war with Japan after the United States did, and spoke directly with Roosevelt, who confirmed the attack and said America would declare war the next day.

That night, Churchill and Harriman sent Harry Hopkins an urgent telegram marking the historic turn. Churchill, Anthony Eden, and others felt relief because American entry meant Britain would no longer face the conflict alone, even though the future remained grim. Churchill briefly worried that Roosevelt might concentrate only on Japan, but on December 11 Hitler declared war on the United States, ensuring that America would be fully engaged against Germany as well. Churchill went to bed feeling saved and thankful.

Soon afterward, Churchill, Lord Beaverbrook, Harriman, Sir Charles Wilson, and senior military leaders sailed in secret for Washington aboard the battleship Duke of York. Roosevelt had tried to dissuade Churchill because the loss of the ship could have crippled the British government, but Churchill went anyway to coordinate wartime strategy. Wilson observed that American entry had transformed Churchill from an exhausted leader under crushing strain into an energized man convinced that England was now safe and that the war could be won. The voyage itself was miserable, with heavy seas slowing the ship, confining passengers below deck, and leaving many ill while Churchill remained talkative and cheerful.

After anchoring in Chesapeake Bay, Churchill and his party flew to a brilliantly illuminated Washington, a striking contrast to blacked-out Britain. Churchill stayed at the White House and developed an intimate working relationship with Roosevelt, symbolized by a famously informal late-night conversation in Churchill’s room. On Christmas Eve, Roosevelt and Churchill appeared together at the National Community Christmas Tree lighting, where Churchill urged Americans to preserve the joy of Christmas for children before returning to the hard sacrifices needed to defend a free and decent world.

On Christmas Day, Inspector Walter Henry Thompson was deeply moved by a personal gift from Roosevelt and Eleanor Roosevelt, which reinforced the warmth Churchill’s party found in Washington. The narrative then widens to show that many reversals still lay ahead, including Singapore, Crete, and Tobruk, and that these defeats would again threaten Churchill politically. Yet by the end of 1942 the tide began to turn through El Alamein, Midway, and Germany’s stalled campaign in Russia, making victory increasingly certain. The chapter closes on New Year’s Eve 1941, with Churchill toasting a year of toil and danger but also a long step toward victory.