And, under severe attack—almost invariably at night—all have to be rescued by reinforcements hastily arriving by helicopter.
With reinforcements arriving from its Syrian factions, the group began their assault on the Kurdish Peshmerga.
He also claimed separatists called in reinforcements and managed to kill two of the assailants.
reinforcement re·in·force·ment (rē'ĭn-fôrs'mənt)
The act or process of reinforcing.
Something that reinforces.
The occurrence or experimental introduction of an unconditioned stimulus along with a conditioned stimulus.
The strengthening of a conditioned response by such means.
An event, a circumstance, or a condition that increases the likelihood that a given response will recur in a situation like that in which the reinforcing condition originally occurred.