Useful reference tool on membership and policies: includes statistics. Also worth exploring the online library has treaties and reports from 1949 onwards.
The official website now contains early committee documents from 1949-1959, press releases from 1961 onwards and over 300 full text books. These provide insight into the history of the organisation, military and security alliances and the NATO perspective on international crises. A good example is post-war Berlin situation
NATO on Duty A new official interactive map has been launched by NATO based on Esri’s geographic information system (GIS) software. Find out about current missions and partnerships. It also some links to stories and case studies provided by NATO.