Battle Drill 5: Enter Building/Clear Room in July 2006 Ranger Manual beforehand, we will all get much farther along in our training, much faster. (They have a lot more information in that older edition) - Section starts at page 6-11 www.fas.org/irp/doddir/army/ranger.pdf
It has been changed to BATTLE DRILL 6. ENTER BUILDING/CLEAR ROOM in later editions. www.globalsecurity.org/military/library/policy/army/fm/7-8/ch4.htm but this is much less detailed and less useful to those unpracticed in all the techniques that comprise its execution.
slow and methodical but really good communication.