Jiří Valášek * 1931 Officials of the Czechoslovak People´s Army in 1948-1989, Member of the Czechoslovak People's Army, Life along the Iron Curtain, The topic of security forces before 1989 1950 - creation of the buffer zone between Czechoslovakia and Western Germany and Austria, 1951 - creation of the restricted border area along the Czechoslovakian border with Western Germany and Austria, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 26 April 1986 - Chernobyl disaster