On 20 January 1564 the Lithuanians under his command killed Russian commander Shuisky .
On 20 January 1564 the Lithuanians under his command defeated the Russian army in the Battle of Ula , which significantly improved Lithuania 's standing in the war .
On 20 January 1564 the Lithuanians under his command killed Russian commander Shuisky and defeated the Russian army in the Battle of Ula , which significantly improved Lithuania 's standing in the war .