Turkish War of Independence: The Birth of a Republic

The Turkish War of Independence (15 May 1919 – 24 July 1923) was a transformative series of military campaigns and a political revolution that emerged from the ruins of World War I. Following the defeat of the Ottoman Empire, Allied powers sought to partition its territories, sparking a nationalist movement that would eventually dismantle a 600-year-old monarchy and establish the modern Republic of Turkey.

Driven by the principles of self-determination, the conflict pitted the Turkish National Movement against Allied forces and various separatist groups. This struggle was not merely a military battle for territory but a fundamental shift in sovereignty, transferring power from the sultan-caliph to the nation.

Key Facts

Allied occupation troops marching at the Grande Rue de Péra (İstiklal Avenue)

Duration: 15 May 1919 to 11 October 1922 (military phase); formally concluded 24 July 1923.
Primary Leader: Mustafa Kemal Pasha (later known as Atatürk).
Core Outcome: Establishment of the Republic of Turkey and the abolition of the Ottoman Sultanate and Caliphate.
Key Treaties: The Treaty of Sèvres (unratified/annulled) and the Treaty of Lausanne (final settlement).
Major Belligerents: Turkish National Movement vs. Greece, the British Empire, France, and various separatist rebels.

The Path to Resistance: 1918–1919

Near East areas of control and front lines upon the Armistice of Mudros

The prelude to the war began with the Armistice of Mudros in October 1918, which ended hostilities between the Ottoman Empire and the Allies. However, the peace was short-lived as Allied troops began occupying strategic points, including Istanbul.

Front page of İkdam on 4 November 1918, "The Three Pashas Escaped"

The occupation of Istanbul and the subsequent political instability created a vacuum of power. While the Istanbul government remained under Allied influence, Mustafa Kemal Pasha was dispatched on a mission to Anatolia, where he began organizing local resistance against the partition of the homeland.

Mustafa Kemal Pasha in 1918, then an Ottoman army general

The Greek Landing at Smyrna

The catalyst for full-scale war occurred on 15 May 1919, when Greek troops landed at Smyrna (İzmir). This event galvanized Turkish nationalists and accelerated the organization of a structured resistance movement.

Greek troops marching on İzmir's coastal street, May 1919.

The Rise of the Ankara Government

Grand Vizier Ferid Pasha, damat of the royal family

Mustafa Kemal and his colleagues consolidated power through a series of congresses, most notably in Erzurum, where they outlined the National Pact—a set of goals to secure Turkish borders and independence.

Mustafa Kemal and his colleagues in Erzurum, 5 July 1919

By 1920, the movement established the Grand National Assembly in Ankara, creating a rival government to the one in Istanbul. This new administration was recognized as the legitimate voice of the Turkish people, while the Istanbul government was increasingly viewed as a puppet of the Allies.

The Treaty of Sèvres vs. The Treaty of Lausanne

In 1920, the Allies presented the Treaty of Sèvres, which proposed a severe partitioning of Anatolia. The Ankara government rejected this treaty entirely, viewing it as an infringement on Turkish sovereignty.

Borders (spheres of influence not shown) of the Ottoman Empire according to the unratified Treaty of Sèvres (1920) which was annulled and replaced by the Treaty of Lausanne in 1923

Following military victories on multiple fronts, the Turkish Nationalists forced the Allies back to the negotiating table. This resulted in the Treaty of Lausanne (1923), which recognized Turkey as a sovereign, independent state and replaced the annulled Treaty of Sèvres.

The Treaty of Lausanne, signed in 1923 that guaranteed Turkey's independence, replacing the Treaty of Sèvres

Military Campaigns and Fronts

Muhacirs from the Balkan Wars waiting to cross the Bosphorus to Anatolia, Sirkeci, Istanbul, 1912

The war was fought across several theaters, requiring the transition from irregular militias to a professional regular army.

Western Front: The primary conflict against Greek forces, culminating in the Great Offensive and the liberation of Anatolia.
Eastern Front: Engagements leading to the Treaty of Alexandropol and later the Treaty of Kars with Soviet republics.
Southern Front: Resistance against French forces and Armenian contingents in regions like Cilicia.

A photograph of Hellenic Army troops advancing on Nationalist positions during the 1920 Greek Summer Offensive

The End of the Ottoman Era

Ahmed Tevfik Pasha (Okday) and Rıza Tevfik (Bölükbaşı) at the Paris Peace Conference

With military victory secured, Mustafa Kemal moved to finalize the political revolution. On 1 November 1922, the Grand National Assembly voted to abolish the sultanate. Sultan Mehmed VI fled the country shortly thereafter, ending the monarchy.

Sultan Mehmed VI after his sword girding

On 29 October 1923, the Republic of Turkey was officially declared, marking the transition to a secular nation-state. This era also saw significant demographic shifts; the population exchange between Greece and Turkey, along with the continuation of ethnic cleansing and massacres of Armenian and Greek populations, fundamentally altered the region's demographics, increasing the Muslim population from 80% to 98%.

Turkish troops enter Constantinople on 6 October 1923

Category	Details
Timeline	1919 – 1923
Key Figures	Mustafa Kemal Atatürk, İsmet Pasha
Opponents	Greece, UK, France, Separatist groups
Political Shift	Monarchy $\rightarrow$ Republic
Final Settlement	Treaty of Lausanne (1923)

Frequently Asked Questions

Borders and plebiscites of the National Pact outlined in the Erzurum Congress

Fire caused by the British bombardment in Mudanya (6 July 1920)

British occupation troops marching in Istanbul's Pera (Beyoğlu) quarter

Zones of control held by the Ankara government and the Allies. Istanbul contemptuously referred to anyone who supported the nationalist movement led by Mustafa Kemal as "Kemalîs" or "Kemalcis". Kemalî was used pejoratively as a reference to the Celalî rebels. The foreign press used the term "Kemalists" interchangeably with the word "nationalists" to denote the Ankara-based movement and its armed strength.

A British officer inspecting Greek troops and trenches in Anatolia

Execution of a Kemalist by the British forces in Izmit (1920)

Military situation of Syria and Cilicia, January 1920

A photo which includes Ali İhsan Sâbis, Alexander Cobbe, General Robert Cassels, Gerard Leachman (who was killed in the 1920 Iraqi revolt) and other military personnel in front of Mosul Military Headquarters, 2 November 1918

Fundraising poster by the American Committee for Relief in the Near East

Mustafa Kemal Pasha and his comrades-in-arms at the end of the First Battle of İnönü

A political cartoon: Greek king Constantine runs away from the bomb which reads "KEMAL"

Kemal Pasha inspects the Turkish troops (18 June 1922)

Propaganda poster of the Turkish National Movement

The Abilene Daily Reporter based in Texas, U.S., called Mustafa Kemal "Turkey's George Washington" on 13 October 1922

Hatıra-i Zafer (Memory of Victory) by Hasan Sabri in 1925.

What was the primary cause of the Turkish War of Independence?

The war was caused by the Allied occupation and planned partition of the Ottoman Empire following World War I, specifically the landing of Greek troops in Smyrna and the restrictive terms of the Treaty of Sèvres.

Who was the leader of the Turkish National Movement?

Mustafa Kemal Pasha, later known as Atatürk, was the central military and political leader who organized the resistance and founded the Republic of Turkey.

What is the difference between the Treaty of Sèvres and the Treaty of Lausanne?

The Treaty of Sèvres (1920) sought to partition Anatolia and severely limit Turkish sovereignty; it was rejected by the nationalists. The Treaty of Lausanne (1923) recognized Turkey as a sovereign, independent state with defined borders.

How did the war end the Ottoman Empire?

The victory of the nationalist movement led to the abolition of the sultanate in 1922 and the caliphate shortly after, culminating in the declaration of the Republic of Turkey on October 29, 1923.

What were the demographic consequences of the conflict?

The conflict resulted in a massive population exchange between Greece and Turkey and the systematic removal of native Christian populations (Armenians and Greeks) through massacres and deportations, significantly increasing the percentage of Muslims in Anatolia.