Who were the rulers in World War 1?

During World War I, several key rulers were prominent in the major powers involved in the conflict. Notably, Tsar Nicholas II led Russia, while Kaiser Wilhelm II was the Emperor of Germany. In Britain, King George V reigned, and in France, President Raymond Poincaré was in power. Additionally, the Austro-Hungarian Empire was ruled by Emperor Franz Joseph I until his death in 1916, followed by Emperor Karl I.