UNITY has enhanced and built capacity of U.S. cities to prevent violence using the public health approach since 2005, and more than 70 percent of national partners see UNITY as a viable model for preventing violence. This initiative has improved collaboration among cities, national partners and community members, developed useful tools, and provided a forum for cities to work together on critical issues. Read this publication for a discussion of major findings from the 2013 UNITY evaluation, UNITY Eight-Year Assessment: Results of an Innovative Initiative to Improve the Urban Response to Youth Violence.