The Battle of Tannenberg, also known as the Second Battle of Tannenberg, was fought between Russia and Germany between 23 and 30 August 1914, the first month of World War I. The battle resulted in the almost complete destruction of the Russian Second Army and the suicide of its commanding general, Alexander Samsonov. A series of follow-up battles destroyed most of the First Army as well and kept the Russians off balance until the spring of 1915.
The Battle of Caporetto was a battle on the Italian front of World War I.
The 92nd Infantry Division was an African-American, later mixed, infantry division of the United States Army that served in World War I, World War II, and the Korean War. The military was racially segregated during the World Wars. The division was organized in October 1917, after the U.S. entry into World War I, at Camp Funston, Kansas, with African-American soldiers from all states. In 1918, before leaving for France, the American buffalo was selected as the divisional insignia due to the "Buffalo Soldiers" nickname, given to African-American cavalrymen in the 19th century. The divisional nickname, "Buffalo Soldiers Division", was inherited from the 366th Infantry, one of the first units organized in the division.
The Second Battle of the Masurian Lakes, also known as the Winter Battle of the Masurian Lakes, was the northern part of the Central Powers' offensive on the Eastern Front in the winter of 1915. The offensive was intended to advance beyond the Vistula River and perhaps knock Russia out of the war.
The 1st Army was a Royal Italian Army field army, in World War I, facing Austro-Hungarian and German forces, and in World War II, fighting on the North African front.
The First Battle of the Masurian Lakes was a German offensive in the Eastern Front 2–16 September 1914, during the second month of World War I. It took place only days after the Battle of Tannenberg where the German Eighth Army encircled and destroyed the Russian Second Army. Using the rapid movements aided by the East Prussian railway network, the Eighth Army reformed in front of the spread-out Russian First Army and pushed them back across their entire front, eventually ejecting it from Germany. Further progress was hampered by the arrival of the Russian Tenth Army on the Germans' right flank.
The Gorlice–Tarnów offensive during World War I was initially conceived as a minor German offensive to relieve Russian pressure on the Austro-Hungarians to their south on the Eastern Front, but resulted in the Central Powers' chief offensive effort of 1915, causing the total collapse of the Russian lines and their retreat far into Russia. The continued series of actions lasted the majority of the campaigning season for 1915, starting in early May and only ending due to bad weather in October.
The Sherwood Foresters was a line infantry regiment of the British Army in existence for just under 90 years, from 1881 to 1970. In 1970, the regiment was amalgamated with the Worcestershire Regiment to form the Worcestershire and Sherwood Foresters Regiment, which in 2007 was amalgamated with the Cheshire Regiment and the Staffordshire Regiment to form the present Mercian Regiment. The lineage of the Sherwood Foresters is now continued by The Mercian Regiment.
The 41st Division was a unit of the Prussian/German Army. It was established on October 1, 1912, in Deutsch Eylau. The division was subordinated in peacetime to the XX Army Corps. The division was disbanded in 1919 during the demobilization of the German Army after World War I. It was mainly recruited in the Prussian province of West Prussia.
The 26th Division, formally the 26th Division, was a unit of the Prussian/German Army. It was headquartered in Stuttgart, the capital of the Kingdom of Württemberg. The division was subordinated in peacetime to the XIII Corps. The division was disbanded in 1919 during the demobilization of the German Army after World War I. The division was raised and recruited in the Kingdom of Württemberg.
The 27th Division, formally the 27th Division, was a unit of the Prussian/German Army. It was headquartered in Ulm in the eastern part of the Kingdom of Württemberg. The division was subordinated in peacetime to the XIII Corps. The division was disbanded in 1919 during the demobilization of the German Army after World War I. The division was raised and recruited in the Kingdom of Württemberg. Among the most famous soldiers to serve in the division was Erwin Rommel who fought as a lieutenant with the division on the Western Front before being transferred to the Württemberg mountain battalion.
The XIII Army Corps / XIII AK was a corps of the Imperial German Army. It was, effectively, also the army of the Kingdom of Württemberg, which had been integrated in 1871 into the Prussian Army command structure, as had the armies of most German states. The corps was originally established as the Württemberg Corps Command (Korpskommando) in 1817. It became the XIII Army Corps when it was integrated into the Prussian numbering system on December 18, 1871, shortly after the Franco-Prussian War.
The Battle of Caporetto, took place from 24 October to 19 November 1917, near the town of Kobarid, on the Austro-Italian front of World War I. The battle was named after the Italian name of the town of Kobarid.
The 51st Corps was a corps formation of the German Army in World War I. It was formed in September 1916 and was still in existence at the end of the war.
Eberhard Alfred Konrad Karl von Hofacker was a Württemberg army officer who was a Generalleutnant in the First World War and awarded the Pour le Mérite with oak leaves.
Karl Christof Friedrich von Gerok was an officer of Württemberg, general of the infantry of the XXIV Reserve Corps during World War I.
Johannes Karl Louis Richard Eben, from 1906 named von Eben was a Prussian officer who served as a German general of the infantry in World War I.
Bernhard Gottfried Max Hugo Eberhard, Graf von Schmettow, usually shortened to Eberhard Graf von Schmettow, was a German general of World War I.
Ludwig Goiginger was an Austro-Hungarian Lieutenant Field Marshal who notably served in World War I.
Franz Martin Chales de Beaulieu was a German general in World War I. He was also involved in the Herero Wars as chief of staff to Lothar von Trotha.
German Empire 
Imperial German Army 