David Lloyd George served as the Prime Minister of the United Kingdom from 1916 to 1922, leading the country through the latter part of World War I and the subsequent peace negotiations.

Woodrow Wilson was the President of the United States from 1913 to 1921, and he led the country into World War I in 1917.

Otto von Bismarck was the Chancellor of Germany from 1871 to 1890, and he is often referred to as the 'Iron Chancellor' due to his strong leadership and influence in German politics.

Ferdinand Foch was the Supreme Commander of the Allied Forces during World War I, and he played a crucial role in coordinating the military efforts of the Allied powers.

Georges Clemenceau was the Prime Minister of France during World War I, and he was known for his strong leadership and determination, earning him the nickname 'Tiger of France'.

Franz Joseph I was the Emperor of Austria-Hungary from 1848 until his death in 1916, and he ruled during the outbreak and early years of World War I.

Vladimir Lenin was the leader of the Bolshevik Party during the Russian Revolution and the early years of the Soviet Union, and he was often referred to as the 'Red Tsar' due to his authoritarian rule.

Vittorio Emanuele Orlando was the Prime Minister of Italy from 1917 to 1919, and he led the country through the latter part of World War I and the subsequent peace negotiations.

General Yamagata Aritomo was a prominent Japanese military leader and statesman who played a significant role in the country's modernization and military expansion during the Meiji era. He was often referred to as the 'Father of Victory' for his contributions to Japan's military successes.

Woodrow Wilson was the President of the United States when the country declared war on Germany in April 1917, marking the official entry of the United States into World War I.

King Albert I of Belgium was known as the 'Lion of Belgium' for his courageous leadership and unwavering determination in defending the country against the German invasion during World War I.

Robert Borden was the Prime Minister of Canada from 1911 to 1920, and he led the country through World War I, playing a significant role in shaping Canada's involvement in the conflict.

Ekaterina Karavelova was a prominent Bulgarian politician and women's rights activist who played a significant role in the country's political and social development during World War I. She was known as the 'Iron Lady' for her strong leadership and unwavering commitment to her ideals.

Venceslau Brês was the President of Brazil from 1914 to 1918, and he led the country through its involvement in World War I, declaring war on Germany in 1917.

Mustafa Kemal Atatürk, also known as Kemal Pasha, was a prominent Turkish military leader and statesman who played a crucial role in the Turkish War of Independence and the establishment of the Republic of Turkey. He is widely regarded as the 'Father of the Turkish Nation' for his leadership and reforms.