Rapid reaction force

They are equipped to respond to any type of emergency within a short time frame, often only a few minutes, based on unit standard operating procedures (SOPs).

[1] Cavalry units are frequently postured as QRFs, with a main mission of security and reconnaissance.

[2][3] A quick reaction force belongs directly to the commander of the unit it is created from and is typically held in the reserve.

They typically consist of well-trained military units (special forces, paratroopers, marines, etc.)

that can be deployed fairly quickly or on short notice, usually from other major assets and without requiring a large organized support force immediately.