The First naval Treaty Treaty for the Limitation and Reduction of Naval Armament, commonly known as the London Naval Treaty,was an agreement between the United Kingdom,the Empire of Japan,France,Italy and the United States,signed on 22 April 1930,which regulated submarine warfare and limited naval shipbuilding.Ratifications were exchanged in London on October 27,1930,and the treaty went into effect on the same day.It was registered in League of Nations Treaty Series on February 6,1931.The First Naval Treaty • Treaty for the Limitation and Reduction of Naval Armament, commonly known as the London Naval Treaty, was an agreement between the United Kingdom, the Empire of Japan, France, Italy and the United States, signed on 22 April 1930, which regulated submarine warfare and limited naval shipbuilding. Ratifications were exchanged in London on October 27, 1930, and the treaty went into effect on the same day. It was registered in League of Nations Treaty Series on February 6, 1931