Chronologically the order is as follows:
The Dirty Dawg
side BB&MTC
side FP&M
side DH&BAT
side BB&MTC+
side FP&M+
Dawn of Divisions
The ones in bold are currently serializing (ie not fully out in volumes/complete), while the rest are complete. Dawn of Divisions so far just seems to be some "slice of life" type things for now, but still takes place before the Dirty Dawg is formed so read that however you want in the order.
Hope this helps!