Comprehensive analysis of sources and monographic literature enabled detailed coverage of military and political developments on the territory of the Moldavian State in the context of the Northern Bukovyna history. This article describes the peripeteia of the Moldovan-Polish and Moldovan-Turkish relations concerning Bukovna lands, the results of the then Moldovan hosts activities were found on the territory of Bukovyna. It is noted that after the Khotyn War in 1621 the military-political situation in Moldova was stabilized, but its relations with Poland were not regulated. Throughout the 17th century the Ottoman rulers continually increased responsibilities and limited vassal rights of the Moldavian owners. To strengthen Polish-Moldovan relations used master Myron Barnovskyy (1626-1629), ff the Mohy-la family, but the Turks dropped him from the throne in favor of Olexander Kokonul (1629-1630), the son of former master Radu Mikhna (1623-1626), and then Moses Mohyla reached the Moldavian throne (1630-1631, 1633-1634). The latter was eliminated by Olexander Iliash (1620-1621, 1631-1633), who, after ten years of absence returned to the Moldavian throne. After the Sultan threw Myron Barnovskyi and Moses Mohyla, the henchmen of Rzeczpospolita, Vasil Lupu came to power in Moldova (1634-1653), and pro-Polish position in the country weakened. Due to frequent rear-rangements on the Moldavian throne seven masters were replaced. At this time the Khotyn fortress continued to maintain its strategic importance. From the fortress the Turkish-Tatar troops raided the Polish territory of Galicia and Podillia. During the Polish-Turkish war of 1633-1634 the terri-tory of Bukovyna did not experience significant devastation. The border areas of Mold ova and Rzeczpospolita were not the object of attacks by Polish magnates and Tatars. In particular, events of local importance continued to take place in Chernivtsi. During V. Lupu's ruling relatively quiet times came to Bukovyna land resulting in a demographic situation stabilization after long fighting and regulating economic life.