The plans of national uprising, the main goal of the AK, were changed a few times. The first one emerged when there still existed the Soviet-German alliance, the second one when the Soviet Union joined the anti-Nazi coalition. The last one was elaborated in the autumn of 1943 after Moscow broke off the diplomatic relations with Poland and when it turned out for sure that the Polish territory would be first entered by the Red Army. In this plan the uprising received the codename “Burza” (the “Tempest”). It assumed that the very moment when the frontlines advanced close to Poland, all the troops and structures of the AK would be called up to arms under the names of the pre-war Polish Army units (divisions and regiments), and increase sabotage actions. But first of all, they would begin to fight openly the retreating German troops, trying to get in touch at tactical level with the Red Army. In captured cities the underground authorities would come to light (the region and district delegate offices), take over the power and welcome as hosts the entering Soviet troops. Thus the uprising was to be a successive action and not just a one-time appearance in the entire country.
“Burza” began on January 15, 1944 with mobilization in Volhynia (the so-called “Polskie Kresy Wschodnie” – the Polish Eastern Borderlands) where local troops – transformed into the 27th Volhynian Infantry Division of the AK – began actions against the Germans. However, if during the fights the AK units had to cross the frontlines, they were disarmed by the NKVD (the Peoples Commissariat for Internal Affairs – Soviet secret political police). Despite the negative turnout, the AK High Command decided to continue the “Burza”. More and more mobilized units entered the combat, and the greatest concentration of troops fought together with the Red Army in the battle of Vilnius (July 6 and 7, 1944). A few days later the NKVD detachments surrounded the Poles, disarmed them and interned. A part of them were able to manoeuvre out of encirclement. Again, the AK continued the insurgent action and its troops participated in capturing the subsequent cities and town: together with the Red Army in case of the big cities (like Lviv or Vilnius), or often on their own, in case of attacking some smaller German garrisons. For instance, in the region of Lublin, the AK units captured 7 cities on their own and 11 more together with the Soviets. The “Burza” covered a large territory from the Carpathians to Vilnius and the Lower Bug River, some 120 thousand soldiers fighting. On July 30, 1944, Stalin ordered to disarm the AK, and the representatives of the Underground State that came out of the hiding and took over the offices were arrested. At least 20 to 30 thousand people were deported to penal colonies in the interior of the Soviet Union, most of them have never returned.