Here are some of the most famous leaders during World War I:

• President Woodrow Wilson of the United States – Led the U.S. entry into WWI in 1917 and helped shape the post-war peace settlement.

• Kaiser Wilhelm II of Germany – The German emperor whose aggressive foreign policy is considered a contributing factor to the outbreak of the war.

• King George V of the United Kingdom – The British monarch who led his country through much of the war.

• Prime Minister David Lloyd George of the United Kingdom – Took over as Prime Minister in 1916 and helped lead the British war effort.

• Tsar Nicholas II of Russia – The Russian emperor who abdicated in 1917 as the Bolshevik Revolution unfolded in his country.

• Marshal Ferdinand Foch of France – The supreme commander of the Allied forces, who directed the final offensives that defeated Germany.

• General John “Black Jack” Pershing – The American Expeditionary Force commander who led U.S. troops in Europe.