The wisdom of Mallow's policy is demonstrated when the Republic of Korell declares war on the Foundation. Mallow had previously sold a vast array of nuclear-powered devices to the Korellians without bothering to establish a priestly hierarchy to control them. The Korellians had assumed that this left them free to conquer the Foundation, but they discovered that they still needed Foundation technical assistance to maintain the Foundation's technology. Once the Foundation-made goods begin failing, the Korellians find their industrial economy collapsing. Unable to carry on the war, the Korellians surrender to the Foundation.