Byzantine Armies AD 1118-1461

https://archive.org/details/byzantine-armies-ad-1118-1461-by-ian-heath-angus-mc-bride-z-lib.org/page/n31/mode/2up

https://imtw.ru/topic/8423-vizantiya-vostochnaya-rimskaya-imperiya/

https://novoscriptorium.com/2019/10/03/west-european-soldiers-in-the-armies-of-the-empire-of-nicaea/