military-operations

The provided text does not contain the actual content of Chapter 21: Soviet Disintegration, but instead includes front matter such as the chapter titles list, abbreviations, foreword, and the beginning of Chapter 1. Therefore, no specific events or ideas from Chapter 21 can be summarized. The text sets the context for the book's scope, emphasizing the complexity of the Third World War, the involvement of various nations, and the importance of understanding the Soviet perspective with newly available information.