There was no single leader during WW1. Each country had their own leader.
wwii- adolf hitler.
Europe is not a single country. It's made up of many independent countries, each with their own leader.
The leader of Germany in WW1 was not a king, his title was Kaiser, specifically, Kaiser Wilhelm II
During World War I, the National Socialist German Workers' Party (NSDAP), commonly known as the Nazi Party, did not have a prominent leader, as it was not yet a significant political force. The party was founded in 1920, after the war had ended. The most notable figure associated with the party, Adolf Hitler, joined in 1919 and later became its leader in the early 1920s.
Kaiser Wilhelm II
Tsar Nicholas II was the leader of Tsarist Russia in World War 1.
nobody
Vladimir Lenin was the Russian revolutionary leader at the end of World War 1.
Kaiser Wilhelm II was the leader of Germany during the Great War.
wwii- adolf hitler.
Woodrow Wilson
Radoslavov
== == Eleftherias Venizelas
Woodrow Wilson
Lenin
Pershing
David Lloyd George was the Prime Minister of the UK during World War I.