Beginning in 1919, the Department actively operated against Germany, with 30 outposts located there. The most important was the outpost in Berlin, called In.3. It was headed by Jerzy Sosnowski, who came there in the spring of 1926. In 1924 – 27, Bydgoszcz office of the Department, commanded by Major Marian Steifer, successfully carried out Operation Cart (Operacja Wozek), during which German correspondence between Berlin and East Prussia was controlled. In April 1939, the Independent Situational Office Germany (Samodzielny Referat Sytuacyjny Niemcy) was formed. This office gathered all kinds of information regarding Nazi Germany, presenting daily and weekly reports to the Polish General Staff and the government. Since mid-June 1939, daily meetings took place at the office, with reports sent to Polish Commander-in-chief.
