This chapter looks at the effect of territorial fragmentation, starting from the level of the local economy. Subsequently, it traces its repercussions to international politics, which led to the formation of a new international image of East Central Europe as inherently fragmented and particularistic. The chapter assumes a multi-dimensional approach to the creation of new borders between Silesia and Estonia through military developments, through bilateral, multi-lateral, or international dynamics, and puts a strong focus on local agency, e.g. in the case of merchants, who were among the most important agents to mitigate the impact of borders and re-establish severed networks. Moreover, the chapter explores how the proliferation of borders and scepticism concerning territorial size shaped a highly normative and pessimistic international discourse about the survivability of the new ‘small states’, which many regarded to be merely provisional states sooner or later to be reintegrated into recovering Germany and Russia