Brave WWI Life-Saver and Conquerer of the Cossack's Flag

[saxcob]

...here are presents offered to the Reserve-Infanterie-Regiment 64 Sergeant Eugen Ising from Buer (Westphalia)

• a silver framed portrait of Captain von Brietzke, engraved: “In grateful memory Lutovice 18 Nov 1914 (facsimile signature: Captain v Brietzke)

• a cigarette case with engraved initials “EI” on the outside and “To the saviour of my husband of 18. November 1914 / In gratitude / Mrs von Brietzke / nee von Benningsen”; on the right: “Eugen Ising"

The newspaper cutting mentions a letter of Brietzke in which he describes the event itself but also another episode which happened one day before (17th) when Ising conquered a cossack’s flag. The text also refers to Ising as being mentioned in the regimental history. Does anyone have that or knows more about the two of them?