Complex sentence: Einsatzkommando 1/IV was disbanded in November, 1939 and it's officers and personnel were converted into units of the Sicherheitspolizei and stationed in the Polish General Government.
Split into simpler sentences: Einsatzkommando 1/IV was disbanded in November, 1939. It's officers and personnel were converted into units of the Sicherheitspolizei and stationed in the Polish General Government.