The I Corps was a formation of the Imperial German Army. The headquarters of the corps were located in Königsberg

Königsberg

Königsberg was the capital of East Prussia from the Late Middle Ages until 1945 as well as the northernmost and easternmost German city with 286,666 inhabitants . Due to the multicultural society in and around the city, there are several local names for it...

. At the beginning of World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

, the corps was attached to the 8th Army and transferred to the Eastern Front

Eastern Front (World War I)

The Eastern Front was a theatre of war during World War I in Central and, primarily, Eastern Europe. The term is in contrast to the Western Front. Despite the geographical separation, the events in the two theatres strongly influenced each other...

.

In 1893, the component units of the corps were:

• 1st Division
  1st Division (German Empire)
  The 1st Division was a unit of the Prussian/German Army. It was formed in Königsberg in March 1816 as a Troop Brigade . It became the 1st Division on September 5, 1818. From the corps' formation in 1820, the division was subordinated in peacetime to the I Army Corps...
  
  
• 2nd Division
  2nd Division (German Empire)
  The 2nd Division was a unit of the Prussian/German Army. It was formed in Danzig in March 1816 as a Troop Brigade . It became the 2nd Division on September 5, 1818. In 1890, the headquarters of the division was relocated to Königsberg , then the capital of East Prussia...
  
  
• 1st Heavy Artillery Regiment von Linger
• 1st Light Infantry Battalion Graf York von Wartenberg
• 1st Pioneer Battalion Fürst Radziwill
• 18th Pioneer Battalion
• 1st Training Battalion

In 1900, the component units of the corps were:

• 1st Division
  1st Division (German Empire)
  The 1st Division was a unit of the Prussian/German Army. It was formed in Königsberg in March 1816 as a Troop Brigade . It became the 1st Division on September 5, 1818. From the corps' formation in 1820, the division was subordinated in peacetime to the I Army Corps...
  
  
• 2nd Division
  2nd Division (German Empire)
  The 2nd Division was a unit of the Prussian/German Army. It was formed in Danzig in March 1816 as a Troop Brigade . It became the 2nd Division on September 5, 1818. In 1890, the headquarters of the division was relocated to Königsberg , then the capital of East Prussia...
  
  
• 37th Division
  37th Division (German Empire)
  The 37th Division was a unit of the Prussian/German Army. It was formed between March 25 and April 1, 1899 in Allenstein . The division was initially subordinated in peacetime to the I Army Corps . In 1912, it was transferred to the newly formed XX Army Corps...
  
  
• 1st Heavy Artillery Regiment von Linger
• 1st Light Infantry Battalion Graf York von Wartenberg
• 1st Pioneer Battalion Fürst Radziwill
• 18th Pioneer Battalion
• 1st Training Battalion

In 1912, the component units of the corps were:

• 1st Division
  1st Division (German Empire)
  The 1st Division was a unit of the Prussian/German Army. It was formed in Königsberg in March 1816 as a Troop Brigade . It became the 1st Division on September 5, 1818. From the corps' formation in 1820, the division was subordinated in peacetime to the I Army Corps...
  
  
• 2nd Division
  2nd Division (German Empire)
  The 2nd Division was a unit of the Prussian/German Army. It was formed in Danzig in March 1816 as a Troop Brigade . It became the 2nd Division on September 5, 1818. In 1890, the headquarters of the division was relocated to Königsberg , then the capital of East Prussia...
  
  
• 1st Heavy Artillery Regiment von Linger
• 1st Light Infantry Battalion Graf York von Wartenberg
• 1st Pioneer Battalion Fürst Radziwill
• 18th Pioneer Battalion
• 1st Training Battalion
• 2nd Zeppelin
  Zeppelin
  A Zeppelin is a type of rigid airship pioneered by the German Count Ferdinand von Zeppelin in the early 20th century. It was based on designs he had outlined in 1874 and detailed in 1893. His plans were reviewed by committee in 1894 and patented in the United States on 14 March 1899...
  
   Battalion

At the outbreak of war in 1914, the component units of the corps were:

• 1st Division
  1st Division (German Empire)
  The 1st Division was a unit of the Prussian/German Army. It was formed in Königsberg in March 1816 as a Troop Brigade . It became the 1st Division on September 5, 1818. From the corps' formation in 1820, the division was subordinated in peacetime to the I Army Corps...
  
  
• 2nd Division
  2nd Division (German Empire)
  The 2nd Division was a unit of the Prussian/German Army. It was formed in Danzig in March 1816 as a Troop Brigade . It became the 2nd Division on September 5, 1818. In 1890, the headquarters of the division was relocated to Königsberg , then the capital of East Prussia...
  
  
• 1st Heavy Artillery Regiment von Linger
• 15th Reserve Artillery Regiment
• 1st Pioneer Battalion Fürst Radziwill
• 1st Training Battalion
• 14th Field Aviation Detachment