The book "History of the United Netherlands from the Death of William the Silent to the Twelve Years' Truce, 1584-85" was written by the famous American historian John Lothrop Motley. In this study, the author examines the complex events and historical circumstances that took place in the Netherlands between 1584 and 1585. Motley analyzes a transitional period in the country's history, beginning with the death of Wilhelm the Silent, a prominent political leader and head of the insurgent government of the Netherlands. The author examines what consequences the death of this great figure had for the political situation in the country and what changes and challenges faced the Dutch society and government. In his book, Motley uses many primary sources, analyzes historical facts and events from different angles to reveal complex aspects of the events that took place in the Netherlands during this period. His work helps the reader to better understand the historical events, political conflicts and socio-cultural transformations that took place in the country during this important period of its history.