Aristide Briand (French: [aʁistid bʁiɑ̃]; 28 March 1862 – 7 March 1932) was a French statesman who served eleven terms as Prime Minister of France during the French Third Republic and was a co-laureate of the 1926 Nobel Peace Prize.

He was born in Nantes, Loire-Atlantique of a petty bourgeois family. He attended the Nantes Lycée, where, in 1877, he developed a close friendship with Jules Verne. He studied law, and soon went into politics, associating himself with the most advanced movements, writing articles for the anarchist journal Le Peuple, and directing the Lanterne for some time. From this he passed to the Petite République, leaving it to found L'Humanité, in collaboration with Jean Jaurès.

At the same time he was prominent in the movement for the formation of trade unions, and at the congress of working men at Nantes in 1894 he secured the adoption of the labor union idea against the adherents of Jules Guesde. From that time, Briand was one of the leaders of the French Socialist Party. In 1902, after several unsuccessful attempts, he was elected deputy. He declared himself a strong partisan of the union of the Left in what was known as the Bloc, in order to check the reactionary Deputies of the Right.

Pierre Werner (29 December 1913 - 24 June 2002) was a Luxembourg politician. Pierre Werner was born in Saint-André-lez-Lille, Nord, France to parents from Luxembourg. During the Nazi occupation of Luxembourg (1940–45) Werner, working as a banker, gave clandestine support to the resistance against the occupation forces. After World War 2 he became the Controller of the banking system in his country. He attended the Bretton Woods conference which set up the International Monetary Fund (IMF). Werner entered the Luxembourg government as Finance Minister in 1953, and was 19th and 21st Prime Minister from 1959 to 1974 and from 1979 to 1984. He also served as Minister for Culture.

As Prime minister, Werner, a Christian Democrat, undertook the diversification of the national economy, hard hit by a major Europe-wide crisis in the steel industry, by attracting new industrial investments, as well as financial services to the Grand Duchy. He placed Luxembourg on the map of global satellite communications. He is remembered for having used “tripartite” social mediation (industry, labour and government) to overcome the severe steel crisis which lasted from 1979 to 1984. He placed the process of European integration at the centre of the policy of his country. With friends such as Joseph Bech, Jean Monnet and Robert Schuman, Werner was a determined advocate of European integration. During his terms in office, he negotiated the relocation of several European institutions to Luxembourg.

David Lloyd George, 1st Earl Lloyd-George of Dwyfor OM, PC (17 January 1863 – 26 March 1945) was a British Liberal politician and statesman. He was Prime Minister of the United Kingdom at the head of a wartime coalition government between the years 1916–22 and was the Leader of the Liberal Party from 1926–31.

During a long tenure of office, mainly as Chancellor of the Exchequer, he was a key figure in the introduction of many reforms which laid the foundations of the modern welfare state. He was the last Liberal to be Prime Minister, as his coalition premiership was supported more by Conservatives than by his own Liberals, and the subsequent split was a key factor in the decline of the Liberal Party as a serious political force. When he eventually became leader of the Liberal Party a decade later he was unable to lead it back to power.

He is best known as the highly energetic Prime Minister (1916–22) who guided the Empire through the First World War to victory over Germany and her allies. He was a major player at the Paris Peace Conference of 1919 that reordered the world after the Great War. Lloyd George was a devout evangelical and an icon of 20th century liberalism as the founder of the welfare state. He is regarded as having made a greater impact on British public life than any other 20th century leader, thanks to his leadership of the war drive, his postwar role in reshaping Europe, and his introduction of Britain's social welfare system before the war.

Marshal Ferdinand Foch (French pronunciation: [fɔʃ]), GCB, OM, DSO (2 October 1851 – 20 March 1929), was a French soldier, military theorist, and First World War hero credited with possessing "the most original and subtle mind in the French army" in the early 20th century.

Foch's prestige soared as a result of the 1914 victory at the Marne for which he was widely credited as the chief actor while commanding the French Ninth Army. This led to his promotion to Marshal of France and ultimately "Supreme Commander of the Allied Armies" in 1918, at which time he played a decisive role in halting a renewed German advance on Paris in the Second Battle of the Marne.

Postwar historians took a less sanguine view of Foch's talents as commander, particularly as that idea took root that his military doctrines had set the stage for the futile and costly offensives of 1914 in which French armies suffered devastating losses. The efficacy of Foch's tactical ideas are debated—the Ninth Army's counterattacks at the Marne generally failed, but his sector resisted determined German attacks while holding the pivot on which the neighbouring French and British forces depended in rolling back the German line. One of his battlefield reports from the Marne—"Hard pressed on my right; center is yielding; impossible to maneuver. Situation excellent, I shall attack!"—won fame as a symbol both of Foch's battlefield leadership and of French determination to resist the invader at any cost.