Documents of Polish radio intelligence from the period of the Battle of Warsaw in 1920

Documents of Polish radio intelligence from the period of the Battle of Warsaw in August 1920 represent a new type of historical source and a record of one of the decisive battles in the world history. Defeating the Bolshevik army not only foiled the Russian conquest of Poland and states who newly regained their independence after World War I compromising communist victory in Europe. The documents of Polish radio intelligence of the Battle of Warsaw are one of the first testimonies to the use of radio monitoring and of new methods of deciphering e enemies’ codes. lt was also the Battle of Warsaw here the radio monitoring and those new deciphering techniques played a role that determined the outcome of the battle.