They didn't stop building pentagonal and star forts in the Middle Ages. Some of the most important fortifications in US history are pentagon plus bastion star f

They didn't stop building pentagonal and star forts in the Middle Ages. Some of the most important fortifications in US history are pentagon plus bastion star forts. https://en.wikipedia.org/wiki/Fort_Sumter#/media/File:Fort_Sumter_Aerial_View.jpg https://en.wikipedia.org/wiki/Fort_Sumter#/media/File:Fort_S... https://en.wikipedia.org/wiki/Fort_McHenry#/media/File:Fort_McHenry_I.jpg https://en.wikipedia.org/wiki/Fort_McHenry#/media/File:Fort_...