This article presents an analysis of the evolution and intensity of Polish-Ukrainian and Lithuanian-Ukrainian strategic partnerships. The secondary purpose of this article is to expand the theoretical understanding of strategic partnerships, by presenting an evolutionary analytical model and scale of cooperation intensity. The application of this model shows Polish-Ukrainian and Lithuanian-Ukrainian strategic partnerships’ similarities and dissimilarities, intensity, strategic goals and common benefit. Qualitative analysis of these two cases shows that despite different partners’ strategic fit and cooperation, neither partnership can be considered real strategic cooperation.