Urban operations (UO) are operations planned and conducted in an area of operations (AO) that includes one or more urban areas. An urban area is a topographical complex where man-made construction or high population density is the dominant features. The increasing world population and accelerated growth of cities means that UO in future conflicts will be very likely. UO are often conducted against enemy forces that may be mixed in with the civilian population.
Field Manual No. 7-30: The Infantry Bridge