I Corps (German Empire)
| I Army Corps I. Armee-Korps |
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|---|---|
Flag of the Staff of a Generalkommando (1871–1918)
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| Country |
 Prussia /  German Empire
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| Type | Corps |
| Size | Approximately 44,000 (on mobilisation in 1914) |
| Garrison/HQ | Königsberg (now Kaliningrad, Russia) |
| Engagements | |
The I Army Corps / I AK (German: I. Armee-Korps) was a corps level command of the Prussian and then the Imperial German Armies from the 19th Century to World War I.
It was established with headquarters in Königsberg (now Kaliningrad, Russia). Initially, the Corps catchment area comprised the entire Province of East Prussia, but from 1 October 1912 the southern part of the Province was transferred to the newly formed XX Corps District.
In peacetime, the Corps was assigned to the VIII Army Inspectorate, which became the 1st Army at the start of the First World War. The corps was still in existence at the end of the war, and was disbanded with the demobilisation of the German Army after World War I.
The I Corps fought in the Austro-Prussian War against Austria in 1866, including the Battle of Trautenau and the Battle of Königgrätz.
The Corps served in the Franco-Prussian War against France in 1870–1871. It saw action in the Battle of Noiseville, the Battle of Gravelotte, the Siege of Metz, the Battle of Amiens, the Battle of Hallue, and the Battle of St. Quentin, among other actions.
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