CONTENTS: Foreword-1, Foreword-2, Preface, List of Tables, List of Maps, 1. Introduction, 2. Analysis of the Land Boundary Agreement, 3. Haldibari, Mekliganj and Dinhata Enclaves: Settlement, identity and internal security of the settlers of an adverse possession of land and place under fencing, 5. Settlement, contesting identity and internal security: General Observations, 6. Conclusion and Suggestions, Appendix-1 Bibliography, Appendix-2 Land Boundary Agreement, Appendix-3 One hundred Constitution Amendment Act, 2015, Appendix-4 The Citizenship Amendment Act, 2019, Appendix-5 Notification and official land document of the Enclave inhabitants.