CASUALTY RECORD // August 3, 1759
Battle of Kay
Estimated casualties — killed, wounded, captured, and missing — by side, with confidence labels per surviving record.
Casualties by side
2 sides catalogued · combined 11,700–13,300 estimated
Russia
4,700–5,000
Medium-confidence figure
Prussia
7,000–8,300
Medium-confidence figure
Battle context
The Battle of Kay, fought on 23 July 1759 near Kay (Kije) in the Neumark, was an engagement between a Russian force of 40,000–41,000 under Pyotr Saltykov and a Prussian force of 26,000–28,000 under Carl Heinrich von Wedel, with Moritz Franz Kasimir von Wobersnow and Heinrich von Manteuffel also commanding on the Prussian side. Prussian casualties of 7,000–8,300 against Russian losses of 4,700–5,000 indicate a clear Russian tactical advantage in the engagement. Fought during the Seven Years' War, the battle took place in the Neumark region and represented a significant check on Prussian forces operating against Russia in the eastern theater of the war. The disparity in casualties and force sizes — Russia engaging with a substantially larger army — reflects the growing pressure the Russian Empire was able to apply to Prussia during this phase of the conflict.
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