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In page Ivan the Terrible:

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Báthory then launched a series of offensives against Muscovy in the campaign seasons of 1579–81 to try to cut the Kingdom of Livonia from Muscovy. During his first offensive in 1579, he retook Polotsk with 22,000 men. During the second, in 1580, he took Velikie Luki with a 29,000-strong force. Finally, he began the Siege of Pskov in 1581 with a 100,000-strong army. Narva, in Estonia, was reconquered by Sweden in 1581.[citation needed]