"Defending Frontiers: The Mechanical Engineering Arsenal" delves into the pivotal role that mechanical engineering plays in shaping the landscape of defense. This book explores the multifaceted contributions of mechanical engineers to national security, showcasing their innovative solutions and technological advancements. From traditional machinery on the battlefield to cutting-edge developments like drones, this comprehensive examination spans the historical evolution and contemporary applications of mechanical engineering in defense. Through insightful chapters, readers gain an understanding of how strategic machinations and the relentless pursuit of innovation by mechanical engineers have safeguarded and propelled national security. Aspiring to shed light beyond conventional warfare, the book also uncovers the impact of mechanical engineering in non-traditional defense areas. "Defending Frontiers" not only celebrates the ingenuity of mechanical engineers but also serves as a valuable resource for scholars, practitioners, and enthusiasts interested in the intersection of mechanical engineering and defense technology.