This book examines India’s Northeast borderland – strategically positioned at the confluence of South Asia, East and Southeast Asia – from the perspective of international relations. The volume interrogates the geopolitics of region-making in both colonial and postcolonial times and traces the transformation of Northeast India from a British strategic frontier into a securitised borderland. It situates the region in transnational interactions both in conflict and cooperation with its immediate neighbouring regions of China, Bangladesh, and Myanmar, especially in the context of India’s Look East/Act East policy.