Historical periodization frequently takes wars as turning points—as ruptures that signify the end or beginning of an era. At the same time, front lines have often been taken as boundaries that contain the activities of one side or the other. Thus, discontinuity and disjuncture rather than continuity and fluidity have often been the points of emphasis among historians who have taken war events as turning points, or who have seen lines of combat as impermeable. A new focus on the Sino-Japanese War period has begun to reveal ways in which that moment served not as an interruption but as a part of longer term processes of change and development that characterized China’s mid-twentieth century. It also permits us to gain a deeper understanding of the fluidity of human movement and socio-economic interaction that frequently crossed both political and military boundaries and to think about similarities, linkages, and differences between various Chinese spaces. The aim of this paper is to consider ways in which the new generation of scholarship on the Sino-Japanese War period offers new ways of thinking about continuity, change, similarity and difference across both temporal and physical boundaries that have served as the parameters for much of the earlier scholarship on the period. To this end, the paper examines recent literature on the Sino-Japanese War period, as well as literature that crosses that period, to examine ways in which this historiography has challenged conventional periodizations and political and geographical delineations.