%0 Journal Article %T Polish‑Ukrainian Relations and the Security of the Polish Republic in the Context of the Events of 1930 in Małopolska Wschodnia %A Ostanek, Adam Adrian %J Studia Historica Gedanensia %V 2017 %R 10.4467/23916001HG.17.009.9063 %N Tom 8 (2017) %P 163-193 %@ 2081-3309 %D 2017 %U https://ejournals.eu/en/journal/studia-historica-gedanensia/article/stosunki-polsko-ukrainskie-a-bezpieczenstwo-ii-rzeczypospolitej-w-kontekscie-wydarzen-1930-roku-w-malopolsce-wschodniej %X The nationality policies of states within the borders of which significant groups of representatives of national minorities are resident, form one of the fundamental elements of any system of security. Within the borders of the Second Polish Republic, more than thirty percent of the population consisted of non‑Poles. The most numerous – making up fourteen percent of the population – was the Ukrainian minority. It is very important to note that this minority, which densely populated the territories of three south‑eastern voivodeships, in many cases constituted a de facto majority in a given region. This article aims to demonstrate how the relations between Poles and Ukrainians affected the security situation in the Second Republic. The example given here is the events that took place in 1930 in Małopolska Wschodnia. Between mid‑July and the beginning of November, the voivodeships of Lwów, Tarnopol, and Stanisławów became the scene of a wave of attacks on state and private property. They were carried out by Ukrainian nationalists with the support of sympathizers. From mid‑September, deploying at first police and then army, the Polish authorities took decisive actions against the saboteurs. The tactic of collective responsibility directed against Ukrainians did, indeed, lead to an end of guerilla operations, but it cast a shadow on Polish‑Ukrainian relations, making it difficult to establish a modus vivendi in mutual relations.