This article provides an assessment of how Paraguay, the weaker power, managed to defeat Bolivia in the 1932-35 Chaco War, fought over the disputed and remote Gran Chaco region that separated the two countries. The article argues that Paraguay’s logistical superiority was a decisive factor leading to victory in 1935. It uses a broad definition of logistics to include the acquisition of matériel before the war as well as the establishment of national and international supply lines during the war. Comparing and contrasting Bolivia and Paraguay in the period from the early 1920s to 1935, this article suggests that the preparation and development of an effective logistical infrastructure by Paraguay in the late 1920s and early 1930s were vital for the operational success that it had achieved on the battlefields of the Chaco by late 1933.