This paper is a short summary of the results of a research study conducted about the effect of a community mobilization program to prevent violence against women and girls in La Vallée, Haiti called the Rethinking Power program of Beyond Borders/ Depase Fwontyè yo. Rethinking Power implemented programming in La Vallée by from 2017-2021, a period that also included challenges such as COVID-19 and a political, economic and social crisis in Haiti. Despite the difficult context, the program attempted to “leave no one behind” and to ensure that its violence prevention efforts worked for all women and girls, including adolescent girls and women and girls with disabilities. The Global Women’s Institute with its partners Institut de Formation et de Service (IFOS, 2017-2019) and Pentagone (2020-2021) led the design and implementation of a quasi-experimental study to understand the effect of Rethinking Power.