Second Russian invasion of East Prussia (1914)

Second East Prussian campaign
Part of the Eastern Front of World War I
Date27 September – 2 November 1914
Location
Result Indecisive
Territorial
changes
Russians captures part of East Prussia
Belligerents
German Empire Russian Empire
Commanders and leaders
Hermann von François Nikolai Ruzsky
Units involved
8th Army 1st Army
10th Army
Strength
On 20 September 1914
129,814 men
354 machine guns
540 guns
On 28 September 1914
Total 525,682 men
10 Army
247,467 men
565 machine guns
749 guns
1 Army
278,215 men
272 machine guns
648 guns
Casualties and losses
Official German medical reports:
5,250 KIA,
18,169 WIA,
4,930 MIA
Total 28,349
lost:
9 machine guns
9 guns
Official Russian medical reports:
14,762 KIA,
53,692 WIA,
32,169 MIA
Total 101,290
lost:
65 machine guns
64 guns

The offensive of the Russian armies in October 1914 with the aim of capturing East Prussia after in Battle of Augustów (1914).