Jan Piotr Sapieha (English: John Peter Sapieha, 1569–1611) was a Polish nobleman, general, politician, diplomat, governor of Uświat county, member of the Parliament and a skilled commander of the Polish troops stationing in the Moscow Kremlin.Sapieha was a participant of the Polish-Swedish War - he brought a private regiment of 100 Cossacks, and commanded the right wing, consisting of 400 royal hussars and mounted 700 Cossack, of the Polish army during the famous Battle of Kircholm in 1605.