 Complete the following phrase:  After the Polish capitulation following the Soviet Invasion of Poland on 17 September 1939, ZG 76 reorganised in the Phoney War period. II. and III.ZG 76 finally were able to convert from the Bf 109 to Bf 110 and shed their Jadggruppe designations. ZG 76 flew protection patrols Defence of the Reich over the German North Sea coast in late 1939. Elements of it took part in the 