Halberd fighting basics from Joachim Meyers book about the knightly art of swordsmanship 1570 A.D. The description of the chasing hews can be found on page 32recto (XXXII) to 33recto (XXXIII) in the last chapter of the original book found here:

https://daten.digitalesammlungen.de/...


PS: Obviously NOT exclusive for formation fighting. Meyers manuscript shows mostly techniques for a duel! But you can use many of the concepts also for formation battles like thrusting or striking in a tighter way.