This article traces the emergence of the border regime on France’s eastern frontier after 1918. Following the Treaty of Versailles, the Franco-German boundary moved to accommodate the return of the ‘lost provinces’ Alsace-Lorraine to France, and throughout the interwar years contemporaries viewed this border as one of the most strategically and symbolically important boundaries on the European continent. It was, on the one hand, France’s defensive limits, while, on the other, it was a meeting point between distinct national communities, who shared a language and culture. This border thus became a site that reflected broader fears and concerns, as worries over Alsace’s integration in the 1920s gave way to anxieties about the threat posed by Nazi Germany in the 1930s. By focusing upon the border, this article reveals that the return of Alsace involved negotiation both between centre and periphery and across the frontier, and sheds light on the growing insecurities of the Third Republic in its final two decades.

中文翻译：

---

跨越边界：1918-1939 年法国在阿尔萨斯的东部边界的形成

本文追溯了 1918 年之后法国东部边境边界制度的出现。《凡尔赛条约》之后，法德边界发生了变化，以适应“失落的省份”阿尔萨斯 - 洛林回归法国，以及整个两次世界大战期间的同时代人将这条边界视为欧洲大陆上最具战略意义和象征意义的边界之一。一方面，这是法国的防御限制，另一方面，它是共享一种语言和文化的不同民族社区之间的交汇点。由于对 1920 年代阿尔萨斯融合的担忧让位于对 1930 年代纳粹德国构成的威胁的焦虑，因此该边界成为反映更广泛恐惧和担忧的地点。通过专注于边界，