>>18434971
>Could the Mongols have destroyed Khwarazmia
Yes, the Khwarezmians were the same steppeniggers as they were and met them in open battle repetitively.
>or the Abbasids if they didnt have Chinese siege engineers?
Big no.

>Why didnt those same engineers help at Europe?
Chang (and Persian) engineers were present in the 1st Mong invasion of Hungary. In the 2nd one they were not there at all with the Mongol Empire broken up and all the Golden Horde had to work with are dumb slavs.

>>18435041
So if the chink engineers were present, could the mongols have taken eastern Europe?

>>18434971
China had more cities than castles. Europe had more castles than cities.
Chinese engineers were very good at taking cities. But were poorly equipped to handle castles.
One Korean castle held out for a decade.
Persia was also mostly cities with heavy fortifications but rarely castles.

>>18435107
But couldnt the mongols just bypass the castles? And even if not, castles are just more walls. Chinese sappers can take down ultra thick city walls of China just fine. The Mongols would also have had Persian sappers with them.

>>18435560
Real life isn’t a video game

>>18434971
> Why didnt those same engineers help at Europe?
you know Chingis was in good terms with the Pope and didn´t even thought to invade Europe right?