Russian soldiers in training posing for a photograph with a Maxim M1910 MG, ca. 1917. Today 109 years ago, on August 17, 1914, the Battle of Stallupönen began, the first major battle on the Eastern Front in the First World War. Following their Schlieffen Plan of first defeating France in the west and then Russia in the east, the Germans only deployed their 8th Army into East Prussia on the Eastern Front, upon declaring war on Russia on August 1, 1914. Opposing them were the Russian 1st and 2nd Armies to the north and further south, vastly outnumbering the Germans in troops. The German 8th Army positioned themselves on a defensive line at Gumbinnen on the Angrapa river, 32 km from the Russian border. The plan was to retreat west to the Vistula river in case of a Russian attack. Feeling confident in his forces and being reluctant to give up German territory, Hermann von François, Commander of the German 1st Army Corps of the 8th Army, decided to disobey orders and engage the Russian...