NATO

North Atlantic Treaty Organization (NATO ) is an  intergovernmental  military alliance based on the  North Atlantic Treaty which was signed on 4 April 1949. The organization constitutes a system of  collective defence whereby its member states agree to mutual defense in response to an attack by any external party. Formerly a deterrent for communism spreading from Eastern Europe into Western Europe during the 1980's, NATO became involved in a different kind of war with the outbreak of the ZA1 virus within central Europe.

NATO saw itself as the sole defender against the ZA1 virus and was responsible for the protection of the majority of Western Europe for the duration of the ZA1 outbreak sweeping across the European landscape.