IX Corps (German Empire)

IX Army Corps IX. Armee-Korps
Flag of the Staff of a Generalkommando (1871–1918)
Active	30 October 1866 (1866-10-30)–1919 (1919)
Country	Prussia /  German Empire
Type	Corps
Size	Approximately 44,000 (on mobilisation in 1914)
Garrison/HQ	Altona
Engagements	Franco-Prussian War Battle of Gravelotte Second Battle of Orléans (1870) Battle of Le Mans World War I Battle of the Frontiers Battle of Mons First Battle of the Marne Battle of Pozières Battle of Amiens (1918)

Franco-Prussian War

World War I

The IX Army Corps / IX AK (German: IX. Armee-Korps) was a corps level command of the Prussian and German Armies before and during World War I.

IX Corps was one of three formed in the aftermath of the Austro-Prussian War (the others being X Corps and XI Corps). The Corps was formed in October 1866 with headquarters in Altona. The catchment area included the newly annexed Province of Schleswig-Holstein, the Grand Duchies of Mecklenburg-Schwerin and Mecklenburg-Strelitz and the Hanseatic cities of Lübeck, Hamburg and Bremen.

During the Franco-Prussian War it was assigned to the 2nd Army.

The Corps was assigned to the III Army Inspectorate but joined the 1st Army at the start of the First World War. It was still in existence at the end of the war. The Corps was disbanded with the demobilisation of the German Army after World War I.