August 3: Germany declared war on France and viceversa, contributing to the escalation of the Great War in 1914. Belgium denies permission for German Army to pass through to France.

World War I, better known as The 'Great War', began on 28th of July, 1914 with the assassination of Austrian Archduke Franz Ferdinand and his wife by a Serbian nationalist in Sarajevo. Austria-Hungary answered with the declaration of war from Austria-Hungary to Serbia. It was the first truly global war.

The “Great War” was a confrontation between the Triple Entente (Britain, France, and Russia) and the Triple Alliance (Austria-Hungary, Germany, and Italy).

On July 28, Austria-Hungary declared war on Serbia, and the tenuous peace between Europe's great powers collapsed.

However, Italy did not honor the commitment made with the Triple Alliance because Britain and France offered Italy all those territories that Italy wanted to annex in order to complete the Italian Unification. Britain and France told Italians that they will provide those territories after the victory.

The Great War ended with the Treaty of Versailles, June 28, 1919.

On 1 August 1914, Germany declared war on Russia, which makes this day, according to some, the date of the official outbreak of World War I. On 2 August 1914 Germany invaded Luxembourg and on 3 August 1914 Germany declared war on France. On 4 August 1914 Germany declared war on neutral Belgium, invading it in a flanking move designed to defeat France quickly. As a result of this invasion of Belgium, Britain declared war on Germany and Austria-Hungary. Canada followed suit and joining the war, but U.S President Woodrow Wilson declared as policy of American neutrality.

Twenty years later, on August 3, 1934, Adolf Hitler became the supreme leader of Germany to merge the offices of the presidency and the foreign ministry in one: Der Führer or "The German People's Guide spiritually, politically and militarily ".