Changes

====Western Europe and the United States worked towards an international alliance====

In spite of general agreement on the concept behind the treaty, it took several months to work out the exact terms. The U.S. Congress had embraced the pursuit of the international alliance, but it remained concerned about the wording of the treaty. The nations of Western Europe wanted assurances that the United States would intervene automatically in the event of an attack, but under the U.S. Constitution the power to declare war rested with Congress. Negotiations worked toward finding language that would reassure the European states but not obligate the United States to act in a way that violated its own laws. Additionally, European contributions to collective security would require large-scale military assistance from the United States to help rebuild Western Europe’s defense capabilities.