World war 1 began June 28 1914.when Germans ruler declared war on Austria Hungary .Austria declared war on Siberia. August 3 German declared war on France and invaded Belgium. August 4 Britain declared war on Germany. At war in France when its winter is usally below 0%. At the beginning both sides, believed that the war would be over by the end of the year. 3 August, 1914 German troops crossed the Belgium border in the narrow gap between Holland and France. Germans are quickly victorious over the Belgians. (battle of the Marne 4th till 10th of September).