Combat & Tactics (1995)

from the back of the book:

Tired of your fighter doing nothing but trading swings with monsters? Are your dungeon denizen's tactics getting a little too routine? Need help setting up that siege of the evil overlord's castle? Then this is the book for you. This exciting expansion to the AD&D game contains rules and systems that will make your battles more vibrant and realistic. There are new rules covering critical hits, tactical options, and combat maneuvers such as shield wall, disarms, and more! Complete weapons tables for all eras of play include lots of new weapons and revised characteristics for old ones. The Combat & Tactics system has been carefully designed to present sets of rules in easy-to-ues modules that you pick and choose from and incorporate into your campagin. Regardless of which ones you do use, you'll find everything works with everything else.