The United States is poised at the outset of a new era in homeland security that reflects long-term changes in the security environment and key advances in homeland security capabilities. The 2014 Quadrennial Homeland Security Review describes the challenges and opportunities of this new era and how the Department of Homeland Security (DHS) and our homeland security partners must strategically posture ourselves to address those challenges. The 2014 Quadrennial Homeland Security Review also takes an important foundational step toward a Secretary-level priority: strengthening Departmental "Unity of Effort." The DHS Unity of Effort Initiative builds important linkages between the Department's planning, programming, budgeting, and execution processes, ensuring that the Department invests and operates in a cohesive, unified fashion, and makes decisions that are transparent and collaborative to drive the Secretary's strategic guidance to results. The DHS FY14-18 Strategic Plan focuses on how we will implement the goals laid out in the 2014 Quadrennial Homeland Security Review. It describes the missions and goals of homeland security, the strategies we use to achieve those goals, and the ways in which we measure our success. It also sets several key, priority efforts under each mission and describes how those priorities will be achieved through the DHS Unity of Effort Initiative. The Homeland Security vision is a homeland that is safe, secure, and resilient against terrorism and other hazards, where American interests, aspirations, and way of life can thrive. This requires the dedication of more than 240,000 employees in jobs that range from aviation and border security to emergency response, from cybersecurity analysis to chemical facility inspections. Our duties are wide-ranging, but our goal is clear - keeping America safe. The 2014 Quadrennial Homeland Security Review reaffirmed the five-mission structure of DHS: Prevent Terrorism and Enhance Security Secure and Manage our Borders Enforce and Administer Our Immigration Laws Safeguard and Secure Cyberspace; and Strengthen National Preparedness and Resilience Accomplishing these missions requires unity of effort - across every area of DHS activity and among the numerous homeland security partners and stakeholders.