Central Europe may be perceived as a homogeneous sub-unit: a geographic locale that shares similar cultural traits, common histories, and a linked troubled past, and one that has embarked on a joint process of European integration in the past three decades. A closer look reveals that there are significant differences hidden in the cracks and the states of Central Europe exhibit large variety in two key elements that makes regional cooperation uniquely challenging: their strategic cultures and their relations toward Russia. Two major factors determine a state’s foreign policy and...