In late September, Pershing led the AEF during the final Meuse-Argonne Offensive which broke the German lines and led to the end of the war on November 11. By war's end, Pershing's command had grown to 1.8 million men.
Dimensions of Castle Walls: the height and thickness of castle walls varied from castle to castle but typically they ranged from between seven to thirty feet in thickness and typically thirty to forty feet in height. The illustration below is a cutaway view of how a typical castle wall is constructed.
As a static structure, castles could often be avoided. Their immediate area of influence was about 400 metres (1,300 ft) and their weapons had a short range even early in the age of artillery. However, leaving an enemy behind would allow them to interfere with communications and make raids. keep was a great tower and usually the most strongly defended point of a castle before the introduction of concentric defence. Keep was not a term used in the medieval period â the term was applied from the 16th century onwards â instead  donjon  was used to refer to great towers, or turris in Latin.