Chinese and Irish Immigrants, and African Americans
For example, other countries that wanted higher control of various regions started investing in other aspects of warfare such as aircraft building which was not covered in the conference. Japan for example started annexing territory in order to ensure greater control over the Pacific region which was also not forbidden by the conference.
It was to discuss the future of Sudetenland in the face of ethnic demands by Hitler
The passage is not showing up, but in general Gargantuan essentially means massive or large
