Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Trial of the Sixteen was a staged trial of 16 leaders of the Polish Underground State held by the Soviet Union in Moscow in 1945. Some accounts say approaches were made in February with others saying March 1945.The Government Delegate, together with most members of the Council of National Unity and the C-i-C of the Armia Krajowa, were invited by Soviet general Ivan Serov with agreement of Joseph Stalin to a conference on their eventual entry to the Soviet-backed Provisional Government. They were presented with a warrant of safety, yet they were arrested in Pruszków by the NKVD on 27 and 28 March. Leopold Okulicki, Jan Stanis aw Jankowski and Kazimierz Pu ak were arrested on 27th with 12 more the next day. A.Zwierzynski had been arrested earlier. They were brought to Moscow for interrogation in the Lubyanka.