This engaging reference work provides readers with detailed coverage on the sieges that have had the biggest impact on world history. In addition to providing basic factual information, this encyclopedia delves into the historical context and significance of each siege. Readers will be able to identify relationships between entries and observe both the gradual evolution of siege warfare over time, and compare and contrast siege characteristics within and among different historical time periods. The encyclopedia's expansive scope will broaden readers' understanding of military history.

The book begins with a preface and an introductory essay that offers a detailed overview of siege warfare throughout history. This is followed by 100 chronological entries on the most significant sieges, beginning with the Siege of Troy (1194–1184 BCE) and ending with the Siege of Mosul (October 17, 2016-July 9, 2017). Each siege entry has a Further Reading section that directs readers to additional information about the siege. Numerous illustrations and maps accompany the text.