At Sea Against the Soviet Fleet examines the critical transformation of naval intelligence during a pivotal era marked by the Cold War and the Vietnam conflict. Bryan Leese meticulously details how US Navy operational intelligence evolved to meet the complexities of modern naval warfare, particularly in response to the increasing threats posed by the Soviet Navy. This book begins by examining the Vietnam War and the institutionalization of shipboard operational intelligence, or what Navy intelligence calls Opintel. The book highlights the establishment of Integrated Operational Intelligence Centers as part of the RA-5C Vigilante program and the innovative strategies that emerged in air combat and targeting.

Leese goes on to underscore the necessity of Opintel to the US Navy's close and distant blockade strategy in the 1960s and 1970s. Capturing the essence of this transformative period, the author discusses the cultural dynamics within the Navy that fostered innovation and interdepartmental collaboration. These developments not only contributed to maintaining a strategic edge over the Soviet Union, but also laid the groundwork for future naval operations in the digital age. By blending rich archival research with firsthand accounts, this book offers a nuanced understanding of how the Navy adapted to an ever-changing operational landscape.