Giles Milton - Churchill’s Unholy Alliance and Why It Changed Everything

Dec 27, 2025

In a riveting conversation, historian Giles Milton, author of The Stalin Affair, delves into the unexpected alliance between Churchill and Stalin during WWII. He highlights the moral complexities of this political shift and the strategic necessity behind it. The duo unpacks key events like the Tehran and Yalta conferences, Stalin's cunning manipulation of his allies, and the post-war fate of Eastern Europe, including Poland's betrayal. Giles sheds light on Churchill's secret strategies against the Soviets and the fragile bonds formed in the heat of war.

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INSIGHT

Churchill’s Strategic U-Turn

Winston Churchill performed a decisive political U-turn in June 1941 to ally with Stalin despite decades of anti-communism.
He judged Nazi Germany the greater evil and chose pragmatic alliance to save Britain.

ANECDOTE

Beaverbrook And Harriman Win Stalin Over

Lord Beaverbrook and Averell Harriman impressed Stalin by listing tangible munitions the West could supply.
Their inventory convinced Stalin the Allies could win and launched large-scale Lend-Lease support.

INSIGHT

The Persian Corridor Solution

The Allies adapted logistics creatively when Arctic convoys proved unsustainable.
Averell Harriman opened a southern supply route via Iran, moving equipment by rail into the USSR.

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In this episode of The Winston Marshall Show, I sit down with historian and bestselling author Giles Milton for a deep historical conversation about the Second World War, the alliance with Stalin, and the decisions that shaped the post-war world.

We explore how Winston Churchill came to ally with Joseph Stalin after Hitler’s invasion of the Soviet Union, despite viewing communism as a murderous and authoritarian system. Giles explains the extraordinary political reversal of 1941, the moral compromises involved, and why Churchill saw the alliance as a necessary pact with the devil.

The discussion moves through the Nazi-Soviet Pact, Lend-Lease, the meetings at Tehran, Yalta, and Potsdam, and the immense role American industrial power played in defeating Hitler. We examine how Stalin manipulated his allies, outmanoeuvred Roosevelt, and secured control of Eastern Europe, laying the foundations for the Cold War.

We also discuss the betrayal of Poland, the division of Germany, the origins of the Iron Curtain, and Churchill’s secret plans to confront the Soviet Union after the war, revealing how fragile the wartime alliance truly was.

A fascinating conversation about power, war, pragmatism, and how the alliance that defeated Nazism reshaped the world that followed.

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Chapters

00:00 Introduction of Giles Milton and The Stalin Affair

04:50 Churchill's Anti-Communist Stance and Political U-Turn

10:46 The Lend-Lease Program and American Aid

22:28 Stalin's Tactics and the Winter Turning Point

26:54 The Tehran Conference and Churchill's Meeting with Stalin

33:34 The Yalta Conference and Post-War Planning

53:43 The Potsdam Conference and the Cold War

59:48 Churchill's Iron Curtain Speech and the End of the Alliance

1:03:45 Operation Unthinkable and Churchill's Final Strategy

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