The introduction of the background classes of the novel in this sub-volume will be classified according to civilization, and each civilization will write a chapter.

Each chapter lists the main classes of the civilization and provides a brief introduction to them.

Notes: 1. The classes of the civilization group with less developed technology will be displayed by [Traditional Class] and [New Class], while the class of the Literate Nation with more advanced technology will be displayed by [Original Class] and [New Class].

2. For each civilization class, the [Land] and [Sea] classes will be introduced separately (if there are air classes, they will be classified as [Land] and [Sea] according to the actual situation).

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