Homeland security begins with hometown security. As part of its commitment to hometown security, the Department of Homeland Security (DHS) has worked to get tools, information, and resources out of Washington, D.C. and into the hands of our federal, state, local, tribal and territorial partners. Tribal Nations are critical partners in our homeland security efforts, and DHS's Office of Intergovernmental Affairs (IGA) promotes an integrated national approach to homeland security by coordinating and advancing federal interaction with state, local, tribal, and territorial (SLTT) governments. IGA is responsible for opening the homeland security dialogue with executive-level partners at the SLTT levels, along with the national associations that represent them. DHS's Office of Intergovernmental Affairs developed this guide to highlight some of the DHS resources available to Tribal Nations to keep our nations safe and secure. This book summarizes and provides links to training, publications, guidance, alerts, newsletters, programs, and services available to Tribal Nations from across the department. This book is not exhaustive and will be maintained as a living document. The resource guide is organized by component and resource type and serves as a starting point for locating DHS resources for Tribal leaders and their staff. A comprehensive index is available to facilitate locating resources. IGA is committed to working with our Departmental and interagency partners to provide the assistance and support Tribal Nations require.