sourced story
1919-1923Reputable source · 2 sourcesDebated

The Asia Minor Catastrophe and the Greek-Turkish Population Exchange

A three-year Greek campaign into Anatolia ends with the burning of Smyrna and a compulsory exchange of over a million people

On the timeline · around 1919-1923 · Independence and the Modern StateIndependence and the Modern StateModern GreeceThe Asia Minor Catastrophe and the Greek-Turkish Population Exchange18801890190019101920193019401950

Quick facts

Greek landing at Smyrna
15 May 1919
War ends with Turkish victory
August-September 1922
Treaty of Lausanne
1923
Population exchanged (estimated range)
1.1-1.5 million Christians; 400,000-500,000 Muslims

What happened

Greek troops landed at Smyrna (modern Izmir) on 15 May 1919, advancing into Ottoman Anatolia as part of the postwar settlement and the pursuit of the Megali Idea. Turkish nationalist forces under Mustafa Kemal halted the Greek advance and then routed it in August 1922, recapturing Smyrna and igniting a catastrophic fire in the city. The war ended in what Greeks call the Asia Minor Catastrophe, and the Treaty of Lausanne, signed in 1923, formalized a compulsory population exchange: estimates of the numbers vary, with one university account putting the transfer at 1.1 million Christians moved from Turkey to Greece and 400,000 Muslims moved from Greece to Turkey, while other institutional accounts cite figures as high as 1.5 million Christians and 500,000 Muslims, making it, by these estimates, the largest compulsory population exchange in history up to that time.

Why it matters

The catastrophe ended a three-thousand-year continuous Greek presence in Asia Minor and the Megali Idea itself as a realistic goal of Greek foreign policy, replacing it with the practical task of absorbing well over a million destitute refugees into a country of barely five million people. The refugee crisis reshaped Greek society, politics, and culture for the rest of the century and remains a foundational trauma in modern Greek national memory.

How we know

The war, the burning of Smyrna, and the population exchange are documented in the Treaty of Lausanne's text and in university public-history accounts of the conflict; exact refugee and casualty figures vary across institutional sources and are reported here as a range rather than a single number.

Sources

See something wrong? . Corrections with a source get fixed fastest.

Part of a timelineHistory of Greece26 events · A classical civilization that spent most of its history as someone else's province, then had to build a nation-state twice, once in 1830 and again in 1974View all →
The Asia Minor Catastrophe and the Greek-Turkish Population Exchange · History of Greece · SourcedStory