Editing Defensive wall (section)

== References ==
{{Commons category|Defensive walls}}
* {{Citation |last=Andrade |first=Tonio |year=2016 |title=The Gunpowder Age: China, Military Innovation, and the Rise of the West in World History |publisher=Princeton University Press |isbn=978-0-691-13597-7}}.
*{{citation|last=Arnold|first=Thomas|year=2001|title=History of Warfare: The Renaissance at War}}
* {{citation|last=Cook|first=Haruko Taya|year=2000|title=Japan At War: An Oral History|publisher=Phoenix Press}}
* {{Citation |last=Lorge |first=Peter A. |year=2008|title=The Asian Military Revolution: from Gunpowder to the Bomb |publisher=Cambridge University Press |isbn=978-0-521-60954-8}}
* Monika Porsche: ''Stadtmauer und Stadtentstehung''{{snd}} Untersuchungen zur frühen Stadtbefestigung im mittelalterlichen Deutschen Reich. Hertingen, 2000. {{ISBN|3-930327-07-4}}.
* {{Citation |last=Nolan |first=Cathal J. |year=2006 |title=The Age of Wars of Religion, 1000–1650: an Encyclopedia of Global Warfare and Civilization, Vol 1, A–K |volume=1 |location=Westport & London |publisher=Greenwood Press |isbn=978-0-313-33733-8}}
* {{citation|last=Purton|first=Peter|year=2009|title=A History of the Early Medieval Siege c. 450–1200|publisher=The Boydell Press}}
* {{Citation |last=Purton |first=Peter |year=2010 |title=A History of the Late Medieval Siege, 1200–1500 |publisher=Boydell Press |isbn=978-1-84383-449-6}}
*{{citation|last=Reger|first=William|year=2016|title=The Limits of Empire: European Imperial Formations in Early Modern World History|publisher=Taylor & Francis}}