Destroy The destroy item on the Game menu is used when you have to destroy a factory, railway or infrastructure. If you destroy a factory it means that you no longer will not be able to buy/produce in that area. It can be necessary to destroy a factory, railway and infrastructure in an area if the enemy is about to conquer it to prevent him from getting production capacity, railway or income. You destroy the following way: 1. Open the area window. 2. Select the factory, railway or infrastructure icon. 2. Choose Destroy on the menu. 3. The factory, railway or infrastructure is destroyed.