Dee ihe na-aga n'ihu na paragraf a - Ndị Crimean Tatars na Nogai Tatars na-ejikarị ebe ndị mmadụ na-ebighị nke ọma nke Wild Fields na mpaghara ndịda nke Russia ozugbo na ndịda nke Severia iji malite mwakpo kwa afọ na mpaghara Russia n'akụkụ Muravsky Trail na Izyum Trail. N'afọ 1591, mwakpo Tatar ruru mpaghara Moscow, na-amanye gọọmentị Russia iwu ụlọ ọhụrụ nke Belgorod na Oskol na 1593, Yelets na 1592, Kromy na 1595, Kursk na 1597, Tsarev-Borisov na Valuyki na 1600. Tsarev-Borisov, aha ya bụ Tsar Boris I, bụ ebe obibi kacha ochie na Sloboda Ukraine. N'oge mwakpo ndị ahụ, ógbè ndị dị nso na Ryazan na ndị dị n'akụkụ Osimiri Oka tara ahụhụ nke ukwuu. Site na mgbasawanye ókèala Russia na ndịda na ọwụwa anyanwụ n'ime ala nke Sloboda Ukraine nke oge a na etiti Osimiri Volga esemokwu ahụ siri ike. Oge ụfọdụ n'agbata afọ 1580 na 1640 "Belgorod Defense Line" nwere ọtụtụ mgbidi, moats, na ebe e wusiri ike ka e wuru na Sloboda Ukraine, na-enye nchekwa na mpaghara ahụ. Mgbe ọtụtụ agha Russia na Crimea gasịrị
Na narị afọ nke iri abụọ na otu, ndị eze Russia malitere ịgba ndị Cossacks ume ka ha biri n'ógbè ahụ, bụ ndị rụrụ ọrụ dị ka ụdị ndị nche nchebe megide mwakpo nke ndị Tatar.