Hawai'i Marines have begun building a $3.5 million "city" that will be used for urban warfare training at Bellows Air Force Station in Waimanalo.

The city, consisting of 85 buildings and four villages made out of about 145 shipping containers of varying sizes, will be used to give Marines, sailors and domestic security agencies a first-hand, local training experience in what has increasingly become the front lines of modern warfare: densely populated urban areas where combatants, terrorists and civilians live and fight side by side.