Question: The 2nd Army Corps took part in the Battle of Tannenberg,  fought between Russia and Germany from 26–30 August 1914, during the first month of what war?
Sentence (from "2nd Army Corps (Russian Empire)"): It was headquartered in Grodno prior to the outbreak of the war, and took part in the Battle of Tannenberg in August 1914.
Relevant evidence: Yes