Decimal cavalry
A steppe organisational grammar -- historical label, not a training syllabus.
The decimal cavalry army, allied steppe groups, and later Chinese and Korean levies (especially for ships) were the force mix. Mobility and siege engineers (often conscripted specialists) appear together in the sources.
This is a historical description of organisation, not a field manual.
Systems
Conquered specialists
Siege engineers and later shipwrights drafted into the project.
Yam posts
Communication as an imperial system.
Khanate courts
Successor governments with different religions and tax styles.
Goryeo levy
A Korean institutional wound: ships, soldiers, princesses as politics.
Census and tax
Yuan and Horde extraction as the after-conquest state.
Meters
Geographic reach
94
Death-toll uncertainty
90
Korean historical weight
80
English pop memory
66
Institutional duration (unified)
40
Tech shift (relative)
32
Hotspots
Mongolian steppe
The political launch.
North China / Zhongdu
Early urban war.
Khwarezm cities
Chronicle massacre zone.
Goryeo
1231-59 war and later ship levy.
Baghdad / Ain Jalut / Japan
Three different kinds of limit and shock.
Materials
Horses and grass
The seasonal logistic fact of a cavalry empire.
Ships (Korea/China)
The failed ocean tool of 1274/81.
Paper and paiza
Passports of the yam -- administration as material.
City stores
Siege as hunger; described, not instructed.
Conquered peoples were drafted. Goryeo shipwrights are part of the force picture for the Japan attempts.
No live ORBAT, no raiding instruction.