river; he had about 2,000 cavalry and some few thousands of infantry (including the more mobile dragoons; about 4,000–5,000). Around 2 pm he was informed that the Russians were close and their first units had started to cross the river; his main force also had the benefit of not being seen by the Russians. In the meantime, a solar eclipse began, creating confusion. Polish cavalry, including the Winged Hussars, launched repeated attacks on the Russian forces that had crossed the river, pushing them back. Russian attempts to cross the river were repeatedly forced back into the water, and attempts to outflank the Polish forces were stopped by the infantry, which took positions along the river and fired at the Russian forces which attempted to cross the river elsewhere. After five or so hours, both sides attempted a major push, and the Poles again were victorious; the Russians, having sustained much higher casualties than the Poles (about 7,000 compared to 700), were demoralized and abandoned attempts to cross the river. The same source claims that among their dead was knyaz Yury Baryatinsky which is obviously wrong. Russian sources give a different account. According to them, after having discovered the Lithuanian army, a detachment under Prince Yury Baryatinsky was involved in the fighting with the Lithuanians while the voivodes of the main army led by Cherkassky sent Baryatinski their cavalry as reinforcement. The rest of the army which consisted of infantry, reiters and supply wagons, also began to move to the battle site. Baryatinsky conducted several attacks on the army of the Great Hetman. Having learned about the approach of the main army of Cherkassky, Radziwiłł decided to retreat. Cherkassky didn't pursue the Lithuanians. Significance Szkłów was the last (if dubious) victory of Janusz Radziwiłł, a powerful and ambitious magnate. Cherkassky retreated temporarily but only to merge with another Russian army under Aleksey Trubetskoy; later that month Radziwiłł would face defeat at the battle of Szepielewicze (Shepeleviche). That battle would mark Russian victory in Lithuania. Shklov was taken by the Russians in September 1654. The besieged Polish–Lithuanian garrison of Smolensk found itself in an isolated situation and lost its hopes to hold out until reinforcements could arrive. This forced the garrison to surrender (see Siege of Smolensk (1654)). A few months later Janusz Radziwiłł would defect from Polish side to that of the invading Swedes, and would eventually die fighting for them,