International weapons transfers send military capabilities, make arms production economically feasible, and construct security relations. They influence buyers’ and sellers’ foreign policies, domestic politics, and military spending behavior. However, data availability has limited their study to the bipolar Cold War and unipolar post-Cold War periods. We thus introduce the Interwar Period International Trade in Arms (IPITA) data, covering dyadic transfers of small arms, light weapons, ammunition, explosives, and major conventional weapons in the years 1920–1939. The IPITA data will offer new avenues to study the drivers, dynamics, and consequences of arms transfers, both in past and future multipolar systems.

中文翻译：

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两次世界大战期间的国际武器贸易：一个新数据集

国际武器转让输送军事能力，使武器生产在经济上可行，并构建安全关系。它们影响买家和卖家的外交政策、国内政治和军费开支行为。然而，数据的可用性限制了他们的研究范围为两极冷战和单极冷战后时期。因此，我们引入了两次世界大战期间国际武器贸易（IPITA）数据，涵盖 1920 年至 1939 年小武器、轻武器、弹药、爆炸物和主要常规武器的二元转让。IPITA 数据将为研究过去和未来多极体系中武器转让的驱动因素、动态和后果提供新途径。