RTBn

AcronymDefinition
RTBnRecruit Training Battalion (US DoD; Marine Corps)
RTBNRanger Training Battalion (US Army)
RTBNRead the Bible Network
References in periodicals archive ?
The progression of the students through the 4th, 5th, and 6th RTBns follows the "crawl, walk, run" model.
Because each type of patrol has benefits, the RTB maintains both in a set ratio, though not a set battle rhythm (this is determined by the various RTBns and their RI companies).