Page "History of Poland" Paragraph 50

The successful outcome of the Polish – Soviet War gave Poland a false sense of being a major and self-sufficient military power, and the government a justification for trying to resolve international problems through imposed unilateral solutions.

The interwar period's Polish territorial and ethnic policies contributed to bad relations with most of Poland's neighbors and to uneasy cooperation with the more distant centers of power, including France, Britain and the League of Nations.