ATP 3-21.20 provides doctrine for the Infantry battalion of the Infantry brigade combat team (IBCT). ATP 3-21.20 describes relationships, organizational roles and functions, capabilities and limitations, and responsibilities within the Infantry battalion.
The principal audience for ATP 3-21.20 is the commanders, staff, officers, and noncommissioned officers within the Infantry battalion.
ATP 3-21.20 applies to the Active Army, the Army National Guard/Army National Guard of the United States, and the United States Army Reserve unless otherwise stated.
This book is a “Mini” (half the size of a piece of paper).
A popular size to carry anywhere (briefcase, large pocket, purse) but the print is large enough for easy reading. The binding is with coil, allowing easy flipping of pages without jamming.
The color covers are laminated for weather protection with black and white inside printing.
(A BIG size version (8 1/2 inch by 11 inch, the same size as a regular sheet of paper) is on this website too)