What happend in 1914 for history?

1914 marked the commencement of World War I, arguably one of the most consequential events in contemporary history that significantly affected geopolitics, societies, economics, and cultures on a global scale. Some crucial developments that took place in 1914 include:

June 28:

- Archduke Franz Ferdinand of Austria, heir to the Austro-Hungarian throne, is assassinated by Gavrilo Princip, a Bosnian Serb separatist, in Sarajevo, Bosnia and Herzegovina (then part of the Austro-Hungarian Empire). This event is later considered the spark that ignites the outbreak of World War I.

July 28:

- Austria-Hungary declares war on Serbia, following the rejection of Austria-Hungary's ultimatum that was deemed humiliating by Serbia.

August 1:

- Germany declares war on Russia after Russia mobilizes its forces to support Serbia.

- Germany invades neutral Belgium, triggering Britain's declaration of war on Germany.

August 3:

- The German Empire launches an invasion of France through Belgium, beginning the famous Schlieffen Plan. Belgium declares war on Germany the next day.

August 4:

- The United Kingdom formally declares war on Germany, thereby officially entering World War I.

August 23:

- Japan joins the war on the side of the Allied Powers (France, Britain, and Russia) in accordance with the Anglo-Japanese Alliance.

By the end of 1914, what began as a localized conflict in the Balkans escalated into a full-scale global war encompassing multiple theaters including Western, Eastern, Balkan, Mediterranean, Eastern African, Middle Eastern, African, and Asiatic areas.