Otto von Below

On 1 August 1914, at the outbreak of the First World War, Below was given command of I Reserve Corps as part of 8th Army on the Eastern Front.[3] He led his Corps in the Battles of Gumbinnen, Tannenberg and the Masurian Lakes. As a result of his successes, he was promoted to General der Infanterie[4] at the end of August 1914 and to command of 8th Army at the beginning of November.[5]

Below commanded the 8th Army in the Second Battle of the Masurian Lakes (February 1915) and the Army of the Niemen (later renamed 8th Army) in the Courland Offensive (May 1915). His forces advanced into Courland and Lithuania as far as the southern reaches of the Western Dvina River.[2]

In October 1916, Below was appointed to the command of Heeresgruppe Below[6] on the Macedonian Front, consisting of the German 11th Army and the First and Second Bulgarian Armies.[7] In April 1917, he was briefly sent to the Western Front to command 6th Army[8] around Lille.[9]

Below next served on the Italian Front from September 1917. Commanding the Austro-German 14th Army[10] (seven German and 10 Austro-Hungarian divisions) in the Battle of Caporetto, his units were able to break into the Italian front line and rout the Italian army, which had practically no mobile reserves. The battle was a demonstration of the effectiveness of the use of stormtroopers and the infiltration tactics developed in part by Oskar von Hutier. The use of poison gas by the Germans played a key role in the collapse of the Italian Second Army.[11] A breakdown in German logistics brought the battle to a close on the line of the Piave River and the front soon froze again in trench warfare.

In February 1918, Below was brought back to the Western Front to command the newly formed 17th Army[10] for the Kaiserschlacht Offensive. Below was expected to overrun Arras during March 1918 in a repeat of Caporetto; his inability to do so led to the failure of the German campaign to capture the Somme that same month.[9] Attacking the stronger, better prepared British Third Army, he had less success than forces further south facing the British Fifth Army.

In January 1918 he made the following revolutionary proposal to Ludendorff: "Forget about the offensive and shorten the front lines as much as necessary; build Panzers throughout all of 1918 and, with your Panzer squadrons, break through all the way to the Channel coast in the Spring of 1919". Below briefly commanded the 1st Army.[12] Shortly before the war's end, Below was involved in preparations for a possible final battle on German territory (Home Defense Forces West).[4]