Complex sentence: East Germany did not have an army at that time-there was only a predecessor of the East German Army, the so-called "Kasernierte Volkspolizei" ("Baracked People's Police").
Split into simpler sentences: East Germany did not have an army at that time. There was only a predecessor of the East German Army, the so-called "Kasernierte Volkspolizei" ("Baracked People's Police").