One of the most important areas of confrontation between the two military-political alliances in World War I was the economy. Both sides attempted to influence the economic situation in the enemy states, but the Entente had more opportunities to do so. The naval blockade was supplemented by a variety of other measures. By the end of 1915, the Entente countries realized the need to coordinate their actions in the economic war and took several steps in this direction in 1916, the most important of which was the conference held in Paris on June 14–17. Although the conference mainly focused on the postwar economic order, the participants first discussed the economic measures that needed to be taken immediately. This article discusses what measures the Allies considered most necessary and how they decided to coordinate their efforts to tighten the economic blockade of the Central Powers. First and foremost, it was necessary to coordinate national systems of trade embargoes with enemy countries, since differences between them allowed the enemy to circumvent the restrictions imposed. Next, it was necessary to decide how to deal with the property and enterprises of subjects of enemy states. In addition, representatives of the Entente countries had to discuss measures to prevent the smuggling of goods from the Entente countries to the Central Powers through neutral countries. The decisions taken at the conference were not binding, but the governments of the participating countries — Great Britain, France, Russia, Italy, and Japan — took them into account when formulating their own policies in the field of economic warfare.