Following the erection of the Berlin Wall on 13 August 1961, the "Grenzbrigade Küste der Grenzpolizei ("GBK")" (Coastal Border Brigade of the Border Police) was incorporated into the "Volksmarine". With the reorganization of 1965 all attack forces, i.e., the fast torpedo boats, were combined into a single flotilla (the 6th Flotilla) and stationed on the Bug peninsula of the island of Rügen. In the 1970s, the "Volksmarine" had grown to about 18,000 men. In the 1980s some of the ships were replaced and the "Volksmarine" acquired Soviet-built fighter-bombers. During 19851989, the "Volksmarine" caused about 180 reported incidents due to a maritime border dispute with Poland in the Pomeranian bay; in subsequent negotiations about two thirds of the disputed maritime area were allocated to the GDR.