The initial creation of the United States' ocean-going battlefleet – otherwise known as the 'New Navy' – was a result of the naval wars and arms races around the Pacific during the late-nineteenth century. Using a transnational methodology, Thomas Jamison spotlights how US Civil War-era innovations catalyzed naval development in the Pacific World, creating a sense that the US Navy was falling behind regional competitors. As the industrializing 'newly-made navies' of Chile, Peru, Japan, and China raced against each other, Pacific dynamism motivated investments in the US 'New Navy as a matter of security and civilizational prestige. In this provocative exploration into the making of modern US navalism, Jamison provides an analysis of competitive naval build-ups in the Pacific, of the interactions between peoples, ideas, and practices within it, and ultimately the emergence of the US as a major power.