in the afternoon of the 22nd, heavy fighting broke out at desvres, samer and south of boulogne. while the bulk of the allied forces consisted of french troops, guderian also notes resistance by british, belgian and dutch forces. under heavy allied aerial bombardment, 2nd panzer division advanced on boulogne after authorization for their attack had been given at 12:40 at noon. at 15:30, halder notes that panzer group kleist began its attack with xli corps on the right and xix corps on the left, judging the overall situation as "much better than we thought". by the evening, guderian had instructed 1st panzer division to switch its main target from calais to dunkirk and to await a coded messages to begin the assault the following day. in the meantime, 10th panzer division was returned from the army reserves to xix army corps. in the late evening of the 22nd, panzer group kleist gave out "gruppenbefehl nr. 13" at 22:30 to determine the military operations for the following day. the main designated targets for the panzer group were the cities of boulogne and calais. xli army corps was to advance north and establish bridgeheads at aire and st omer.