What is Fortress?
A '''fortress''' is a [[building]] [[design]]ed to be [[defend]]ed, which means it was very hard for enemies to get inside. [[Fortification]] kept the people inside safe. There is little difference between a fortress and a [[castle]]. Fortresses normally have thick [[stone]] walls, thicker but less tall than in castles so [[artillery]] cannot break them. There were very small [[window]]s, without [[glass]], so that [[soldier]]s inside could fire out through them. As time passed, the [[weapon]]s they used changed, from [[bow and arrow]], [[crossbow]], [[gun]] or [[cannon]]. Soldiers outside had great difficulty firing into such small windows. The people defending the fortress were also able to drop things like [[Rock (geology)|rocks]] and [[boiling]] [[oil]] on the heads of those below. Successful attacks were usually [[siege]]s. Fortresses were not designed for comfort. They were dark and often damp. The [[Tower of London]] is an example of a fortress. {{military-stub}} [[Category:Fortification]]