The Russian invasion of East Prussia occurred during the First World War, lasting from August to September 1914. As well as being the natural course for the Russians to take upon the declaration of war with Germany, it was also an attempt to focus German military eyes on the Eastern Front, as opposed to the Western Front, where France was increasingly under the strain of her own German invasion. Despite more than threefold numerical superiority (250,000 Germans against 800,000 Russians)[14] invasion ended with a crushing defeat of the Russian army, Russian losses were 9 times larger than the German.