6504 This plan had some key points that were just assumptions
1.- Belgium would not resist the pass of German troops
2.- Britain would remain neutral
3.- Russia would take 6 weeks before reaching full mobilization.
All of this assumptions would prove wrong.
So we all know what happens: the chain of alliances soon draw the European powers into general war, after the Sarajevo Assasination: Austria-Hungary declares war on Serbia July 28th 1914, Russia orders full mobilization in response on August 1st which leads to a German declaration of war on the 2nd, followed by a declaration of war againt France on the 3rd.
On August 4th Germany took the initiative and crossed the Belgian border, which caused a British declaration of war for violating Belgian neutrality.
Austria-Hungary declared war on Russia and Serbia to Germany on August 6th.
The first conflict of the war was the
Battle of Liège on August 5th
German troop defeated and captured the 12 forts guarding the city, but in an unexpected action Belgium not only resisted the German invasion but stalled the advance until the 16th
this delayed German plans and was the first of many factors leading to the failure of the Schlieffen plan