| gptkbp:instanceOf | gptkb:military_operation 
 | 
                        
                            
                                | gptkbp:conductedBy | gptkb:NATO 
 | 
                        
                            
                                | gptkbp:consequence | heightened tensions between NATO and Warsaw Pact increased nuclear alert by Soviet Union in 1983
 
 | 
                        
                            
                                | gptkbp:declassified | 2015 
 | 
                        
                            
                                | gptkbp:documentedIn | gptkb:National_Security_Archive gptkb:NATO_archives
 CIA reports
 
 | 
                        
                            
                                | gptkbp:frequency | gptkb:annual 
 | 
                        
                            
                                | gptkbp:location | gptkb:Europe 
 | 
                        
                            
                                | gptkbp:notableEvent | gptkb:Able_Archer_83 misinterpretation as possible real attack by USSR in 1983
 Soviet nuclear forces raised alert in 1983
 
 | 
                        
                            
                                | gptkbp:notableFor | 1983 
 | 
                        
                            
                                | gptkbp:notableParticipant | gptkb:Belgium gptkb:Canada
 gptkb:Denmark
 gptkb:France
 gptkb:Greece
 gptkb:Italy
 gptkb:Luxembourg
 gptkb:Netherlands
 gptkb:Norway
 gptkb:Portugal
 gptkb:Spain
 gptkb:Turkey
 gptkb:United_Kingdom
 gptkb:West_Germany
 gptkb:United_States_European_Command
 gptkb:Supreme_Headquarters_Allied_Powers_Europe_(SHAPE)
 gptkb:NATO_military_staff
 
 | 
                        
                            
                                | gptkbp:purpose | test nuclear command and control procedures 
 | 
                        
                            
                                | gptkbp:relatedTo | gptkb:Cold_War gptkb:Soviet_Union
 gptkb:United_States
 gptkb:Operation_RYAN
 nuclear weapons
 
 | 
                        
                            
                                | gptkbp:SIM | transition from conventional to nuclear war 
 | 
                        
                            
                                | gptkbp:startYear | 1950s 
 | 
                        
                            
                                | gptkbp:bfsParent | gptkb:Able_Archer_83 
 | 
                        
                            
                                | gptkbp:bfsLayer | 5 
 | 
                        
                            
                                | https://www.w3.org/2000/01/rdf-schema#label | Able Archer exercises 
 |