The purpose of these Guidelines is to assist humanitarian actors and communities affected by armed conflict, natural disasters and other humanitarian emergencies to coordinate, plan, implement, monitor and evaluate essential actions for the prevention and mitigation of gender-based violence (GBV) across all sectors of humanitarian response. Part One presents an overview of GBV, provides an explanation for why GBV is a protection concern for all humanitarian actors and outlines recommendations for ensuring implementation of the Guidelines. Part Two provides a background to the ‘thematic areas’ in Part Three. It also introduces the guiding principles and approaches that are the foundation for all planning and implementation of GBV-related programming. Part Three constitutes the bulk of these Guidelines. It provides specific guidance, organized into thirteen thematic area sections: camp coordination and camp management; child protection; education; food security and agriculture; health; housing, land and property; humanitarian mine action; livelihoods; nutrition; protection; shelter, settlement and recovery; water, sanitation and hygiene; humanitarian operations support sectors. The importance of cross-sectoral coordination is highlighted in each section. It is also recommended that sector actors review the content of all thematic area sections. The Guidelines draw from many tools, standards, background materials and other resources developed by the United Nations, national and international non-governmental organizations, and academic sources. In each thematic area there is a list of resources specific to that area, and additional GBV-related resources are provided in Annex 1. The importance of indicators being disaggregated by sex, age, disability and other vulnerability factors is highlighted throughout.