High Quality Content by WIKIPEDIA articles! The Office of U.S. Foreign Disaster Assistance (OFDA) is an organizational unit within the U.S. Agency for International Development (USAID) that has delegated responsible for directing and coordinating U.S. Government relief assistance overseas. Within USAID, OFDA resides within Bureau of Democracy, Conflict, and Humanitarian Assistance (DCHA). USAID provides humanitarian assistance through mitigation and disaster response to rapid and slow onset disasters as well as complex emergencies.