Secondly, the Core Modules do NOT standalone like the Advanced Squad Leader Starter Kits. That’s why the Rulebook is not bound but housed in a 3 ring binder. There are also updates and corrections ( errata) published periodically. The reason I said “most” is that some of the chapters are contained in the modules. There’s a particular “ dependency” between the Advanced Squad Leader Core Modules that dictates the order in which you acquire them.įirstly, it’s important to know that most of the rules are in the Advanced Squad Leader Rulebook (2nd ed).