Battle of Shklow

Battle of Szkłów (Shkloŭ)
	Part of Russo-Polish War (1654–1667) and Tsar Alexei's campaign of 1654–1655
Date	August 12, 1654
Location	Shkloŭ, present-day Belarus
Result	Polish-Lithuanian victory claim: ; Russian victory claim:
Belligerents
Polish–Lithuanian Commonwealth	Russian Tsardom
Commanders and leaders
Janusz Radziwiłł	Yakov Cherkassky; Yury Baryatinsky
Strength
6,000–8,000	71,000 in all armies 12,000 to 41,000 in the engaged army (including Cherkassky, Odoevsky, and Temkin-Rostovsky);
Casualties and losses
700; (Polish claim)	3,000–7,000; (Polish claim); ; Several hundreds killed and wounded; (Russian claim)

The Battle of Szkłów or battle of Shkloŭ or battle of Shklov on August 12, 1654 was one of the first battles of the Russo-Polish War (1654–67); it ended with a indecisive, however, by other sources. A small Polish–Lithuanian force of about 6,000–7,000 under Great Lithuanian Hetman Janusz Radziwiłł surprised a numerically superior Russian force (of 40,000; some estimates speak of 70,000, but they are likely too high) under knyaz Yakov Cherkassky near Shklow (Polish: Szkłów). The battle took place during a solar eclipse. The Russian forces, due to their surprise, were engaged by the Poles unprepared and in smaller portions, which were defeated in turn. Eventually the Poles forced the entire Russian army to retreat; the losses are estimated at 700 for the Poles and 7,000 for the Russians (although they may be overestimated for both sides).