how the mongols breached the great wall?

i don t know, it is pretty hard to imagine that a siege could actually happen under the great wall. i did a little research and it showed that the use of great wall was to send signals, it would only be used as defence fortification during critical situation. as you know, there are many little station on the great wall act as post for patrols consist of 5 soidiers so when ever that discover a possible enemy invasion, they would set up fire to signal the next station, and signal the next... eventually the army will be notified of an enemy invasion and send reinforcement.

Song China's lose again proved the importance of strategical territory. Song's army was much more advanced in weapons and armors. Their training were good, too. But this most wealthy and advanced country at its time in the world could not stop Mongol's advancing. Not because Song's generals did not well enough, it was just beyond their ability. When the northern vast land occupied by nomads, even the great Yangtze river could not bar the enemy, let alone a simple wall. When the Song soldiers sheltered in the heavily fortified castles shooting the enemy with their half auto firearms, they were doomed to final failure.  They gave their initiatives to the Mongols and could never take it back.  Mongols had much more men to employ, much more horses to ride, much more natural resources to smith into weapons. Though the mongols suffered more casualties, they won at last. Song's defeat arised from the lose of nothern territory, and uncontrol of the West Reign, Manchuria etc.

Ok, honestly. Just because Mongolian armies depended on horses does not mean that they can't get over the wall? It's like saying if we pave a river in front of our defense, the enemy tanks can't come in. I must say that Mongols must had a bit more difficulties... but come on. They could easily shower the wall defenders with arrows, cannons (After Mongolians got this technology from the Chinese) and just about anything else that they could think of. I heard that when Mongolians encounter a heavily fortified defense, they catapulted the dead boddies around or in the defense and allow the diseases from the dead bodies to infect and weaken the defense� but who knows. If you watched how Mongolians breached Kim�s great wall in South Park, it doesn�t seem that hard to breach the walls�

Pekau,

Also throwing dead bodies only work when laying seige to a city.  If you are referring to the Great Wall, it probably will not work.

Jiangwei

I have heard that the Mongols simply bypassed the Great wall by sending Subedei with 30000 men to fiegn an attack on the great wall. Tricking the Jin into sending many of thier reinforcements there. While Genghis Khan and the main army of the Mongols went around the great wall and attacked from the west, catching the Jin completely by surprise.

I have also been to an exhibition recently about the great wall and would like to say how incredibly ingenius the technology and engineering was. Particularly during the Ming dynasty, at this time the soldiers stationed on "the great wall" (I know that there were in fact multiple seperate walls) slept on internally heated benches, and used explosive Rockets disguised as crows!!!

but I have a magazine that always was accurate that tells that the Mongols just ride around it