Krzysztof Radziwiłł's raid on Russia

Krzysztof Radziwiłł's raid on Russia (Polish: Zagon Radziwiłla na Rosję) was a military raid on the Grand Duchy of Moscow led by Krzysztof Mikołaj "the Thunderbolt" Radziwiłł, Field Hetman of the Grand Duchy of Lithuania, during the final stages of the Livonian War (1558–1583). The raid started in conjunction with the preparation for the Siege of Pskov. It was a diversionary measure to protect the main Polish–Lithuanian forces at Pskov from a Russian attack. Radziwiłł's cavalry raided deep into the Grand Duchy of Moscow, reaching the Upper Volga. That made the raid one of the most distant Lithuanian raids. The raid was successful: Radziwiłł's men gained much loot, protected the main Polish–Lithuanian forces, and contributed to Tsar Ivan IV agreeing to negotiate the Truce of Jam Zapolski.