Societies have historically experienced a range of long-standing human rights violations during armed conflicts, wars, and military operations in societies, resulting in the loss of several persons and the issue of missing persons becoming an international issue. We will address in this chapter (the historical tracks of missing persons during the war era after 2014) as well as addressing constitutions, international charters, the role of civil society organizations and international organizations working to provide humanitarian assistance, and the role of local and international agencies working in the file of missing persons.