The sultan was kept in the custody of the Allies to ensure the cooperation of an Ottoman administration, which had effective jurisdiction only in Istanbul and part of northern Anatolia, while they disposed of the rest of his empire. At the same time, a Turkish nationalist movement was organized under Atatürk's leadership to resist the dismemberment of Turkish-speaking areas. Atatürk had been sent to eastern Anatolia as inspector general, ostensibly to supervise the demobilization of Ottoman forces and the disposition of supplies, but more particularly to remove him from the capital after he had expressed opposition to the Allied occupation there. Upon his arrival at Samsun in May 1919, Atatürk proceeded to rally support for the nationalist cause and to recruit a nationalist army. Guerrilla warfare against the government gradually grew to full-fledged campaigns against the Greek army that threatened to involve the other Allied occupation forces.

In July 1919, a nationalist congress met at Erzurum with Atatürk presiding to endorse a protocol calling for an independent Turkish state. In September the congress reconvened at Sivas. Although the delegates voiced their loyalty to the sultan-caliph, they also pledged to maintain the integrity of the Turkish nation. The congress adopted the National Pact, which defined objectives of the nationalist movement that were not open to compromise. Among its provisions were the renunciation of claims to the Arab provinces, the principle of the absolute integrity of all remaining Ottoman territory inhabited by a Turkish Muslim majority, a guarantee of minority rights, the retention of Istanbul and the straits, and rejection of any restriction on the political, judicial, and financial rights of the nation.

Negotiations continued between the nationalist congress and the Ottoman government, but to no avail. Atatürk resigned from the army when relieved of his duties. The naming of a chief minister in Istanbul considered sympathetic to the nationalist cause brought a brief improvement in relations, however, and the Ottoman parliament, which met in January 1920, approved the National Pact. In reaction to these developments, Allied occupation forces seized public buildings and reinforced their positions in the capital, arrested and deported numerous nationalist leaders, and had parliament dismissed.

Allied actions brought a quick response from the nationalists. In April they convened the Grand National Assembly in Ankara, in defiance of the Ottoman regime, and elected Atatürk its president. The Law of Fundamental Organization (also known as the Organic Law) was adopted in January 1921. With this legislation, the nationalists proclaimed that sovereignty belonged to the nation and was exercised on its behalf by the Grand National Assembly.

War of Independence

During the summer and fall of 1919, with authorization from the Supreme Allied War Council, the Greeks occupied Edirne, Bursa, and Izmir. A landing was effected at the latter port under the protection of an Allied flotilla that included United States warships. Th 1000 he Greeks soon moved as far as Usak, 175 kilometers iÍÍÍÍÍÍÍÍnland from Izmir. Military action between Turks and Greeks in Anatolia in 1920 was inconclusive, but the nationalist cause was strengthened the next year by a series of important victories. In January and again in April, Ismet Pasha defeated the Greek army at Inönü, blocking its advance into the interior of Anatolia. In July, in the face of a third offensive, the Turkish forces fell back in good order to the Sakarya River, eighty kilometers from Ankara, where Atatürk took personal command and decisively defeated the Greeks in a twenty-day battle.

An improvement in Turkey's diplomatic situation accompanied its military success. Impressed by the viability of the nationalist forces, both France and Italy withdrew from Anatolia by October 1921. Treaties were signed that year with Soviet Russia, the first European power to recognize the nationalists, establishing the boundary between the two countries. As early as 1919, the Turkish nationalists had cooperated with the Bolshevik government in attacking the newly proclaimed Armenian republic. Armenian resistance was broken by the summer of 1921, and the Kars region was occupied by the Turks. In 1922 the nationalists recognized the Soviet absorption of what remained of the Armenian state.

The final drive against the Greeks began in August 1922. In September the Turks moved into Izmir, where thousands were killed during the ensuing fighting and in the disorder that followed the city's capture. Greek soldiers and refugees, who had crowded into Izmir, were rescued by Allied ships.

The nationalist army then concentrated on driving remaining Greek forces out of eastern Thrace, but the new campaign threatened to put the Turks in direct confrontation with Allied contingents defending access to the straits and holding Istanbul, where they were protecting the Ottoman government. A crisis was averted when Atatürk accepted a British-proposed truce that brought an end to the fighting and also signaled that the Allies were unwilling to intervene on behalf of the Greeks. In compliance with the Armistice of Mundanya, concluded in October, Greek troops withdrew beyond the Maritsa River, allowing the Turkish nationalists to occupy territory up to that boundary. The agreement entailed acceptance of a continued Allied presence in the straits and in Istanbul until a comprehensive settlement could be reached.

At the end of October 1922, the Allies invited the nationalist and Ottoman governments to a conference at Lausanne, Switzerland, but Atatürk was determined that the nationalist government should be Turkey's sole representative. In November 1922, the Grand National Assembly separated the offices of sultan and caliph and abolished the former. The assembly further stated that the Ottoman regime had ceased to be the government of Turkey when the Allies seized the capital in 1920, in effect abolishing the Ottoman Empire. Mehmet VI went into exile on Malta, and his cousin, Abdülmecid, was named caliph.

Turkey was the only power defeated in World War I to negotiate with the Allies as an equal and to influence the provisions of the resultant treaty. Ismet Pasha was the chief Turkish negotiator at the Lausanne Conference, which opened in November 1922. The National Pact of 1919 was the basis of the Turkish negotiating position, and its provisions were incorporated in the Treaty of Lausanne, concluded in July 1923. With this treaty, the Allies recognized the present-day territory of Turkey and denied Turkey's claim to the Mosul area in the east (in present-day Iraq) and Hatay, which included the Mediterranean port of Alexandretta (Iskenderun). The boundary with the newly created state of Iraq was settled by a League of Nations initiative in 1926, and Iskenderun was ceded in 1939 by France during its rule as mandatory power for Syria.

Detailed provisions of the treaty regulated use of the straits. General supervisory powers were given to a straits commission under the League of Nations, and the straits are 77c a was to be demilitarized after completion of the Allied withdrawal. Turkey was to hold the presidency of the commission, which included the Soviet Union among its members. The capitulations and foreign administration of the Ottoman public debt, which infringed on the sovereignty of Turkey, were abolished. Turkey, however, assumed 40 percent of the Ottoman debt, the remainder being apportioned among other former Ottoman territories. Turkey was also required to maintain low tariffs on imports from signatory powers until 1929. The Treaty of Lausanne reaffirmed the equality of Muslim and non-Muslim Turkish nationals. Turkey and Greece arranged a mandatory exchange of their respective ethnic Greek and Turkish minorities, with the exception of some Greeks in Istanbul and Turks in western Thrace and the Dodecanese Islands.

On October 29, 1923, the Grand National Assembly proclaimed the Republic of Turkey. Atatürk was named its president and Ankara its capital, and the modern state of Turkey was born.

Data as of January 1995