The Department of Defence and Strategic Studies at Maruthupandiyar College, Thanjavur, was established with the vision of providing quality education in national security, military systems, and strategic affairs. The department offers Undergraduate (UG) programs designed for students aspiring to serve the nation through defence services and public administration.

The department focuses on academic excellence, discipline, leadership, and real-time exposure to defence-related concepts such as geopolitics, military geography, defence economics, nuclear policies, and national security challenges. Along with classroom learning, students actively participate in physical training, leadership activities, seminars, field exposure, and co-curricular programs that build confidence and responsibility.