>>17955263
The Chinese feudal mountain castle Hailongtun ruled by the Yang family of Bozhou was not taken by Mongols either.

Hailongtun and Bozhou held out against the Mongols and Yuan dynasty for decades.

The feudal Yang chieftain who was loyal to the Song only capitulated to the Mongols after the Southern Song government ended in 1279, and Kublai Kham granted him complete amnesty and the Yang family continued to rule as vassals.

It was the Ming dynasty which destroyed Hailongtun in 1600 after a decade long siege.

The Iranian Ismaili castles voluntarily capitulated to the Mongols under orders from their own Imam.

Only Girdkuh castle refused to follow the order and it lasted 15 years of siege by Mongols until they ran out of wearable clothes and died of exposure to the cold weather.

If the other Ismaili castles didn't surrender they would have lasted decades more

The Ismaili castles already survived decades of Seljuq siege.

mongolboos are annoyingly inconvincible about their obvious weakness in europe, i only ever see them use "but they took big strong chinese fortresses and castles", not realising how shitty and different those are from european castles and all the tactics around them.
they got humiliated by hungary doing the bare minimum and to the west they were well aware of who mongols were and what they were like.
yuropoor castle warfare + european geography + cavalry is a hardcounter to mongols no matter what special gimmick like chinese engineers or plague bodies you pull out, good luck trying to reach over walls 4 times as tall as chink ones on top of a hill.
why is it so hard to admit? is btfoing chinks and arabs not enough? do you think horse archers would raze the amazon jungle and modern day ukrainian trenches aswell?