 Complete the following phrase:  The most notable action for this group was the First Battle of Kharkov. On 17 October it bombed rail traffic on the Kupyansk-Valuyki on 17 October and the Kharkov-Volchansk road on 20th. Rail targets in Melitopol 27 October, Rostov 3 November and Svoboda 12 November were bombed as a prelude to an 