This volume serves as a comprehensive chronological record of the tactical operations and significant events involving the United States Army during the Second World War. Mary H. Williams, working under the auspices of the Center of Military History, compiled this reference to provide a structured timeline of ground actions. The work functions as a foundational administrative and historical tool, organizing the complexities of global warfare into a sequential, accessible framework for researchers and historians.

Historians and military researchers frequently cite this volume as an authoritative reference for verifying the timing and sequence of major combat operations. The text is recognized for its clinical precision and remains a standard resource within the United States Army in World War II series.