Quick Reaction Force or (QRF) is a military unit, generally platoon-sized in the United States Military combat arms, that is capable of rapid response to developing situations. They are to have equipment ready, to respond to any type of emergency, typically within ten minutes or less, although this is based on unit Standard Operating Procedures (SOPs). Cavalry Army units are frequently postured as quick reaction forces, with a main mission of security and reconnaissance. (http://en.wikipedia.org/wiki/Quick_reaction_force)