After the Vichy government assumed power in France in 1940, General Henri-Fernand Dentz was appointed high commissioner of Lebanon. This appointment led to the resignation of Emile Iddi on April 4, 1941. Five days later, Dentz appointed Alfred Naqqash (also given as Naccache or Naccash) as head of state. The Vichy government's control ended a few months later when its forces were unable to repel the advance of French and British troops into Lebanon and Syria. An armistice was signed in Acre on July 14, 1941.

After signing the Acre Armistice, General Charles de Gaulle visited Lebanon, officially ending Vichy control. Lebanese national leaders took the opportunity to ask de Gaulle to end the French Mandate and unconditionally recognize Lebanon's independence. As a result of national and international pressure, on November 26, 1941, General Georges Catroux, delegate general under de Gaulle, proclaimed the independence of Lebanon in the name of his government. The United States, Britain, the Soviet Union, the Arab states, and certain Asian countries recognized this independence, and some of them exchanged ambassadors with Beirut. However, even though the French technically recognized Lebanon's independence, they continued to exercise authority.

General elections were held, and on September 21, 1943, the new Chamber of Deputies elected Bishara al Khuri as president. He appointed Riyad as Sulh (also cited as Solh) as prime minister and asked him to form the first government of independent Lebanon. On November 8, 1943, the Chamber of Deputies amended the Constitution, abolishing the articles that referred to the Mandate and modifying those that specified the powers of the high commissioner, thus unilaterally ending the Mandate. The French authorities responded by arresting a number of prominent Lebanese politicians, including the president, the prime minister, and other cabinet members, and exiling them to the Castle of Rashayya (located about sixty-five kilometers east of Sidon). This action united the Christian and Muslim leaders in their determination to get rid of the French. France, finally yielding to mounting internal pressure and to the influence of Britain, the United States, and the Arab countries, released the prisoners at Rashayya on November 22, 1943; since then, this day has been celebrated as Independence Day.

The ending of the French Mandate left Lebanon a mixed legacy. When the Mandate began, Lebanon was still suffering from the religious conflicts of the 1860s and from World War I. The French authorities were concerned not only with maintaining control over the country but also with rebuilding the Lebanese economy and social systems. They repaired and enlarged the harbor of Beirut and developed a network of roads linking the major cities. They also began to develop a governmental structure that included new administrative and judicial systems and a new civil code. They improved the education system, agriculture, public health, and the standard of living. Concurrently, however, they linked the Lebanese currency to the depreciating French franc, tying the Lebanese economy to that of France. This action had a negative impact on Lebanon. Another negative effect of the Mandate was the place given to French as a language of instruction, a move that favored Christians at the expense of Muslims.

The foundations of the new Lebanese state were established in 1943 by an unwritten agreement between the two most prominent Christian and Muslim leaders, Khuri and Sulh. The contents of this agreement, later known as the National Pact or National Covenant (al Mithaq al Watani), were approved and supported by their followers.

The National Pact laid down four principles. First, Lebanon was to be a completely independent state. The Christian communities were to cease identifying with the West; in return, the Muslim communities were to protect the independence of Lebanon and prevent its merger with any Arab state. Second, although Lebanon is an Arab country with Arabic as its official language, it could not cut off its spiritual and intellectual ties with the West, which had helped it attain such a notable degree of progress. Third, Lebanon, as a member of the family of Arab states, should cooperate with the other Arab states, and in case of conflict among them, it should not side with one state against another. Fourth, public offices should be distributed proportionally among the recognized religious groups, but in technical positions preference should be given to competence without regard to confessional considerations. Moreover, the three top government positions should be distributed as follows: the president of the republic should be a Maronite; the prime minister, a Sunni Muslim; and the speaker of the Chamber of Deputies, a Shia Muslim. The ratio of deputies was to be six Christians to five Muslims.

From the beginning, the balance provided for in the National Pact was fragile. Many observers believed that any serious internal or external pressure might threaten the stability of the Lebanese political system, as was to happen in 1975.

Lebanon became a member of the League of Arab States (Arab League) on March 22, 1945. It also participated in the San Francisco Conference of the United Nations (UN) and became a member in 1945. On December 31, 1946, French troops were completely withdrawn from the country, with the signing of the Franco-Lebanese Treaty.

Data as of December 1987