Because most histories of military-industrial relations have rested on the examples of arms production and shipbuilding, balanced accounts of military procurement and technologies during the nineteenth century are difficult to find. In fact, weapons and ships accounted for a relatively small fraction of all the goods and services consumed by nineteenth-century armed forces. This article, which describes the tent industry in the United States during the Civil War, suggests that many military enterprises of the period were characterized by an industrial dynamic that was relatively extensive rather than intensive. In the U.S. tent industry, the leading military contractors were mercantile firms, which stood at the center of disintegrated production and distribution networks. Featuring relatively low-capital production arrangements, large numbers of women workers, and powerful mercantile intermediaries who linked manufacturers and army purchasing agents, the Civil War tent business is an example that challenges traditional accounts of the economic foundations of nineteenth-century military capability.