 The treaty represented the first time that the naval powers had agreed to cap their tonnage of auxiliary vessels, as previous agreements had only affected capital ships.At the 1932 World Disarmament Conference, Hoover urged further cutbacks in armaments and the outlawing of tanks and bombers, but his proposals were not adopted.In 1931, Japan invaded Manchuria, defeating the Republic of China's military forces and establishing Manchukuo, a puppet state.