This evaluation is presented as part of Oxfam's Effectiveness Review Series 2016/17, selected for review under the women's empowerment thematic area. The evaluation took place in August 2016 in East Nusa Tenggara, Indonesia. It intended to evaluate the success of the 'Reducing the Occurrence of Gender Based Violence' project in the region in reducing gender based violence (GBV) and promoting women's empowerment. The project operated with 10 partners in West Nusa Tenggara, East Nusa Tenggara, South Sulawesi, Central Sulawesi and Jakarta. This Effectiveness Review was conducted only in East Nusa Tenggara due to budgetary constraints. In East Nusa Tenggara activities started in 2012 and the project was implemented by four partner organizations: SSP, CIS, YABIKU and LHB APIK. This evaluation was conducted in August 2016 in three districts in East Nusa Tenggara on the Timor island. The evaluation adopted a quasi-experimental impact evaluation design to measure the effect that is causally attributable to - and representative of - the project's intervention.