Recent research has shown the importance of studying military deployments and their effects on a wide range of social, political, and economic outcomes. In particular, it has demonstrated how the US has shaped the international system through the largest, and most enduring, military footprint in the twentieth and twenty-first centuries. However, data on US military deployments have been limited in scope and are often difficult to access, making it harder for researchers to use them more widely. In this article, we focus on three goals. First, we discuss the evolution of the quantitative US military deployment literature in recent years, highlighting some of the insights this work has generated for scholarship on international relations and US foreign policy. Second, we update the existing troop data assembled by Kane (2004) through 2020. We also include new data on deployment levels specific to US service branches. Third, to facilitate the use of these data we introduce troopdata, an R package containing the updated data and convenience functions to allow scholars to more easily access these data.

最近的研究表明研究军事部署及其对广泛的社会、政治和经济结果的影响的重要性。特别是，它展示了美国如何通过 20 和 21 世纪最大、最持久的军事足迹塑造了国际体系。然而，关于美国军事部署的数据范围有限，而且往往难以获取，使得研究人员更难更广泛地使用它们。在本文中，我们重点关注三个目标。首先，我们讨论了近年来定量美国军事部署文献的演变，重点介绍了这项工作为国际关系和美国外交政策的学术研究所产生的一些见解。其次，我们更新了 Kane (2004) 到 2020 年收集的现有部队数据。我们还包括特定于美国服务分支机构的部署级别的新数据。第三，为了方便这些数据的使用，我们引入了troopdata，一个包含更新数据和便利功能的R包，让学者更容易访问这些数据。