Question: When did the country the top-ranking Warsaw Pact operatives came from, despite it being headquartered in the country where A Generation is set, agree to a unified Germany inside NATO?

Knowledge 1: A Generation
"A Generation" is set in Wola, a working-class section of Warsaw, in 1942 and tells the stories of two young men at odds with the Germans occupation of Poland. The young protagonist, Stach (Tadeusz Łomnicki), is living in squalor on the outskirts of the city and carrying out wayward acts of theft and rebellion. After a friend is killed attempting to heist coal from a German supply train, he finds work as an apprentice at a furniture workshop, where he becomes involved in an underground communist resistance cell guided first by a friendly journeyman there who in turn introduces Stach to the beautiful Dorota (Urszula Modrzyńska). An outsider, Jasio Krone (Tadeusz Janczar), the temperamental son of an elderly veteran, is initially reluctant to join the struggle but finally commits himself, running relief operations in the Jewish ghetto during the uprising there. [SEP] Knowledge 2: Warsaw Pact
The Warsaw Treaty's organization was two-fold: the Political Consultative Committee handled political matters, and the Combined Command of Pact Armed Forces controlled the assigned multi-national forces, with headquarters in Warsaw, Poland. Furthermore, the Supreme Commander of the Unified Armed Forces of the Warsaw Treaty Organization which commands and controls all the military forces of the member countries was also a First Deputy Minister of Defense of the USSR, and the Chief of Combined Staff of the Unified Armed Forces of the Warsaw Treaty Organization was also a First Deputy Chief of the General Staff of the Armed Forces of the USSR. Therefore, although ostensibly an international collective security alliance, the USSR dominated the Warsaw Treaty armed forces. [SEP] Knowledge 3: Warsaw Pact
The Warsaw Pact (formally, the Treaty of Friendship, Co-operation, and Mutual Assistance, sometimes, informally WarPac, akin in format to NATO) was a collective defense treaty among Soviet Union and seven Soviet satellite states in Central and Eastern Europe in existence during the Cold War. The Warsaw Pact was the military complement to the Council for Mutual Economic Assistance (CoMEcon), the regional economic organization for the communist states of Central and Eastern Europe. The Warsaw Pact was created in reaction to the integration of West Germany into NATO in 1955 per the Paris Pacts of 1954, but it is also considered to have been motivated by Soviet desires to maintain control over military forces in Central and Eastern Europe.
Knowledge 1: A Generation
"A Generation" is set in Wola, a working-class section of Warsaw, in 1942 and tells the stories of two young men at odds with the Germans occupation of Poland. The young protagonist, Stach (Tadeusz Łomnicki), is living in squalor on the outskirts of the city and carrying out wayward acts of theft and rebellion. After a friend is killed attempting to heist coal from a German supply train, he finds work as an apprentice at a furniture workshop, where he becomes involved in an underground communist resistance cell guided first by a friendly journeyman there who in turn introduces Stach to the beautiful Dorota (Urszula Modrzyńska). An outsider, Jasio Krone (Tadeusz Janczar), the temperamental son of an elderly veteran, is initially reluctant to join the struggle but finally commits himself, running relief operations in the Jewish ghetto during the uprising there. [SEP] Knowledge 2: Warsaw Pact
The Warsaw Treaty's organization was two-fold: the Political Consultative Committee handled political matters, and the Combined Command of Pact Armed Forces controlled the assigned multi-national forces, with headquarters in Warsaw, Poland. Furthermore, the Supreme Commander of the Unified Armed Forces of the Warsaw Treaty Organization which commands and controls all the military forces of the member countries was also a First Deputy Minister of Defense of the USSR, and the Chief of Combined Staff of the Unified Armed Forces of the Warsaw Treaty Organization was also a First Deputy Chief of the General Staff of the Armed Forces of the USSR. Therefore, although ostensibly an international collective security alliance, the USSR dominated the Warsaw Treaty armed forces. [SEP] Knowledge 3: Warsaw Pact
Before creation of Warsaw Pact, fearing Germany rearmed, Czechoslovak leadership sought to create security pact with East Germany and Poland. These states protested strongly against re-militarization of West Germany. The Warsaw Pact was primarily put in place as a consequence of the rearming of West Germany inside NATO. Soviet leaders, as many European countries in both western and eastern side, feared Germany being once again a military power as a direct threat and German militarism remained a fresh memory among Soviets and Eastern Europeans. As Soviet Union had already bilateral treaties with all of its eastern satellites, the Pact has been long considered 'superfluous', and because of the rushed way in which it was conceived, NATO officials labeled it as a 'cardboard castle'. Previously, in March 1954, the USSR, fearing the restoration of German Militarism in West Germany, requested admission to NATO.
Knowledge 1: A Generation
"A Generation" is set in Wola, a working-class section of Warsaw, in 1942 and tells the stories of two young men at odds with the Germans occupation of Poland. The young protagonist, Stach (Tadeusz Łomnicki), is living in squalor on the outskirts of the city and carrying out wayward acts of theft and rebellion. After a friend is killed attempting to heist coal from a German supply train, he finds work as an apprentice at a furniture workshop, where he becomes involved in an underground communist resistance cell guided first by a friendly journeyman there who in turn introduces Stach to the beautiful Dorota (Urszula Modrzyńska). An outsider, Jasio Krone (Tadeusz Janczar), the temperamental son of an elderly veteran, is initially reluctant to join the struggle but finally commits himself, running relief operations in the Jewish ghetto during the uprising there. [SEP] Knowledge 2: Warsaw Pact
The Warsaw Pact (formally, the Treaty of Friendship, Co-operation, and Mutual Assistance, sometimes, informally WarPac, akin in format to NATO) was a collective defense treaty among Soviet Union and seven Soviet satellite states in Central and Eastern Europe in existence during the Cold War. The Warsaw Pact was the military complement to the Council for Mutual Economic Assistance (CoMEcon), the regional economic organization for the communist states of Central and Eastern Europe. The Warsaw Pact was created in reaction to the integration of West Germany into NATO in 1955 per the Paris Pacts of 1954, but it is also considered to have been motivated by Soviet desires to maintain control over military forces in Central and Eastern Europe. [SEP] Knowledge 3: List of multiple Winter Olympic medalists
Rank Athlete Nation Sport Sex Marit Bjørgen Norway Cross-country 8 15 Ole Einar Bjørndalen Norway Biathlon 8 13 Bjørn Dæhlie Norway Cross-country 8 0 12 Ireen Wüst Netherlands Speed skating 5 5 11 5 Raisa Smetanina Soviet Union Unified Team Cross-country 5 10 6 Stefania Belmondo Italy Cross-country 5 10 7 Lyubov Yegorova Unified Team Russia Cross-country 6 0 9 8 Claudia Pechstein Germany Speed skating 5 9 9 Sixten Jernberg Sweden Cross-country 9 10 Sven Kramer Netherlands Speed skating 9 11 Charlotte Kalla Sweden Cross-country 6 0 9 12 Uschi Disl Germany Biathlon 9 13 Viktor Ahn South Korea Russia Short track 6 0 8 14 Ricco Groß Germany Biathlon 8 Emil Hegle Svendsen Norway Biathlon 8 16 Galina Kulakova Soviet Union Cross-country 8 Kjetil André Aamodt Norway Alpine skiing 8 Sven Fischer Germany Biathlon 8 19 Karin Enke East Germany Speed skating 8 Gunda Niemann - Stirnemann Germany Speed skating 8 21 Apolo Anton Ohno United States Short track 8 22 Arianna Fontana Italy Short track 5 8

Answer: May 1990