Colonel Thomas Edward Lawrence (16 August 1888 19 May 1935) was a British archaeologist, army officer, diplomat, and writer, who became renowned for his role in the Arab Revolt (19161918) and the Sinai and Palestine Campaign (19151918) against the Ottoman Empire during the First World War. The breadth and variety of his activities and associations, and his ability to describe them vividly in writing, earned him international fame as Lawrence of Arabia, a title used for the 1962 film based on his wartime activities.

He was born out of wedlock in August 1888 to Sarah Junner (18611959), a governess, and Sir Thomas Chapman, 7th Baronet (18461919), an Anglo-Irish nobleman. Chapman left his wife and family in Ireland to cohabit with Junner. Chapman and Junner called themselves Mr and Mrs Lawrence, using the surname of Sarah's likely father; her mother had been employed as a servant for a Lawrence family when she became pregnant with Sarah. In 1896, the Lawrences moved to Oxford, where Thomas attended the High School and then studied history at Jesus College, Oxford, from 1907 to 1910. Between 1910 and 1914 he worked as an archaeologist for the British Museum, chiefly at Carchemish in Ottoman Syria.

Soon after the outbreak of war in 1914 he volunteered for the British Army and was stationed at the Arab Bureau (established in 1916) intelligence unit in Egypt. In 1916, he travelled to Mesopotamia and to Arabia on intelligence missions and became involved with the Arab Revolt as a liaison to the Arab forces, along with other British officers, supporting the Arab Kingdom of Hejaz's independence war against its former overlord, the Ottoman Empire. He worked closely with Emir Faisal, a leader of the revolt, and he participated, sometimes as leader, in military actions against the Ottoman armed forces, culminating in the capture of Damascus in October 1918.

After the First World War, Lawrence joined the British Foreign Office, working with the British government and with Faisal. In 1922, he retreated from public life and spent the years until 1935 serving as an enlisted man, mostly in the Royal Air Force (RAF), with a brief period in the Army. During this time, he published his best-known work Seven Pillars of Wisdom (1926), an autobiographical account of his participation in the Arab Revolt. He also translated books into English, and wrote The Mint, which detailed his time in the Royal Air Force working as an ordinary aircraftman. He corresponded extensively and was friendly with well-known artists, writers, and politicians. For the RAF, he participated in the development of rescue motorboats.

Lawrence's public image resulted in part from the sensationalised reporting of the Arab revolt by American journalist Lowell Thomas, as well as from Seven Pillars of Wisdom. On 19 May 1935, Lawrence died, at the age of 46, six days after being injured in a motorcycle accident in Dorset.

World War I, often abbreviated as WWI or WW1, also known as the First World War and contemporaneously known as the Great War and by other names, was an international conflict that began on 28 July 1914 and ended on 11 November 1918. It involved much of Europe, as well as Russia, the United States and Turkey, and was also fought in the Middle East, Africa and parts of Asia. One of the deadliest conflicts in history, an estimated 9 million were killed in combat, while over 5 million civilians died from occupation, bombardment, hunger or disease. The genocides perpetrated by the Ottomans and the 1918 Spanish flu pandemic spread by the movement of combatants during the war caused many millions of additional deaths worldwide.In 1914, the Great Powers were divided into two opposing alliances: the Triple Entente, consisting of France, Russia, and Britain, and the Triple Alliance, made up of Germany, Austria-Hungary, and Italy. Tensions in the Balkans came to a head on 28 June 1914 following the assassination of Archduke Franz Ferdinand, the Austro-Hungarian heir, by Gavrilo Princip, a Bosnian Serb. Austria-Hungary blamed Serbia and the interlocking alliances involved the Powers in a series of diplomatic exchanges known as the July Crisis. On 28 July, Austria-Hungary declared war on Serbia; Russia came to Serbia's defence and by 4 August, the conflict had expanded to include Germany, France and Britain, along with their respective colonial empires. In November, the Ottoman Empire, Germany and Austria formed the Central Powers, while in April 1915, Italy joined Britain, France, Russia and Serbia as the Allied Powers.

Facing a war on two fronts, German strategy in 1914 was to defeat France, then shift its forces to the East and knock out Russia, commonly known as the Schlieffen Plan. This failed when their advance into France was halted at the Marne; by the end of 1914, the two sides faced each other along the Western Front, a continuous series of trench lines stretching from the Channel to Switzerland that changed little until 1917. By contrast, the Eastern Front was far more fluid, with Austria-Hungary and Russia gaining, then losing large swathes of territory. Other significant theatres included the Middle East, the Alpine Front and the Balkans, bringing Bulgaria, Romania and Greece into the war.

Shortages caused by the Allied naval blockade led Germany to initiate unrestricted submarine warfare in early 1917, bringing the previously neutral United States into the war on 6 April 1917. In Russia, the Bolsheviks seized power in the 1917 October Revolution and made peace in the March 1918 Treaty of Brest-Litovsk, freeing up large numbers of German troops. By transferring these to the Western Front, the German General Staff hoped to win a decisive victory before American reinforcements could impact the war, and launched the March 1918 German spring offensive. Despite initial success, it was soon halted by heavy casualties and ferocious defence; in August, the Allies launched the Hundred Days Offensive and although the German army continued to fight hard, it could no longer halt their advance.Towards the end of 1918, the Central Powers began to collapse; Bulgaria signed an Armistice on 29 September, followed by the Ottomans on 31 October, then Austria-Hungary on 3 November. Isolated, facing revolution at home and an army on the verge of mutiny, Kaiser Wilhelm abdicated on 9 November and the new German government signed the Armistice of 11 November 1918, bringing the fighting to a close. The 1919 Paris Peace Conference imposed various settlements on the defeated powers, the best known being the Treaty of Versailles. The dissolution of the Russian, German, Ottoman and Austro-Hungarian empires led to numerous uprisings and the creation of independent states, including Poland, Czechoslovakia and Yugoslavia. For reasons that are still debated, failure to manage the instability that resulted from this upheaval during the interwar period ended with the outbreak of World War II in 1939.