1) Fleet of military vehicles 2) Group of military vehicles 
A motor pool refers to all of the individual motor neurons that innervate a single muscle. Each individual muscle fiber is innervated by only one motor neuron, but one motor neuron may innervate several muscle fibers. This distinction is physiologically significant because the size of a given motor pools determines the activity of the muscle it in...
[n] - a fleet of military vehicles controlled by a single agency and available for use as needed
noun a fleet of military vehicles controlled by a single agency and available for use as needed
a standby fleet of motor vehicles available for temporary use by appropriate personnel, as at a military or governmental installation.