The 1st Army was a field army-level command in the ground forces of Austria-Hungary during World War I. The army fought in Galicia and Russian Poland in 1914–15 before being briefly dissolved in the summer of 1916. Shortly afterwards, it was reformed and sent to fight in the Romanian Campaign for the next two years. The 1st Army was demobilized in April 1918 due to its heavy losses, following Romania's surrender.
The IV Army Corps / IV AK was a corps level command of the Prussian and then the Imperial German Armies from the 19th Century to World War I.
The XX Army Corps / XX AK was a corps level command of the German Army before and during World War I.
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 7th Cavalry Division was a unit of the German Army in World War I. The division was formed on the mobilization of the German Army in August 1914. The division was disbanded in 1919 during the demobilization of the German Army after World War I.
The 6th Cavalry Division was a unit of the German Army that fought on Eastern and Western Fronts during World War I. The division was formed on the mobilization of the German Army in August 1914 and was disbanded in 1919 during the demobilization of the German Army after World War I.
The 4th Cavalry Division was a unit of the German Army in World War I. The division was formed on the mobilization of the German Army in August 1914. The division was disbanded in 1919 during the demobilization of the German Army after World War I.
The history of the German Cavalry in World War I is one of an arm in decline.
The I Cavalry Corps was a formation of the German Army in World War I. It was formed on the mobilization of the German Army in August 1914 and disbanded in March 1918.
The III Cavalry Corps was a formation of the German Army in World War I. The corps was formed on mobilization of the German Army in August 1914 and disbanded in 1919 during the demobilization of the German Army after World War I.
The 1st Army was an army level command of the German Army in World War I. It was formed on mobilization in August 1914 from the VIII Army Inspectorate. The army was dissolved on 17 September 1915, but reformed on 19 July 1916 during the Battle of the Somme. It was finally disbanded in 1919 during demobilization after the war.
Armee-Abteilung Gaede / Armee-Abteilung B was an army level command of the German Army in World War I. It served on the Western Front throughout its existence and formed the extreme left wing.
Armee-Abteilung Falkenhausen / Armee-Abteilung A was an army level command of the German Army in World War I. It served on the left (southern) wing of the Western Front throughout its existence.
Cavalry Corps Schmettow was a formation of the German Army in World War I.
The Guards Reserve Corps was a corps level command of the German Army in World War I.
The North Army was an army level command of the German Army that existed briefly at the outbreak of World War I.
The Landwehr Corps was a corps level command of the German Army in World War I.
The VII Army Corps / VII AK was a corps level command of the Prussian and then the Imperial German Armies from the 19th Century to World War I.
The VI Army Corps / VI AK was a corps level command of the Prussian and then the Imperial German Armies from the 19th Century to World War I.
The V Army Corps / V AK was a corps level command of the Prussian and then the Imperial German Armies from the 19th century to World War I.
German Empire 
