The First London Naval Treaty was the culmination of ongoing negotiations among the world's major naval powers aimed at preventing an arms race that was spiraling out of control in the interwar period. The treaty was signed in the wake of the Washington Naval Treaty of 1922, which had established limitations on naval armament after World War I. However, advancements in naval technology and a resurgence of militarism in some countries prompted the need for renewed agreements. The First London Naval Treaty involved the United States, the United Kingdom, Japan, France, and Italy, and mandated reductions in capital ship tonnage, with specific limitations on the number and class of warships each nation could possess. Following the ratification and exchange of documents in London, the treaty took effect immediately, indicating a unified commitment to reducing naval armament levels and fostering co-operation among the signatory nations. The process symbolized a collective approach to international security and disarmament during an era fraught with tensions leading up to World War II.