So I'm doing research for a large Crusader Kings mod set in east Asia around the 10th or 11th century, and I'm trying to get a good grip on the state of weapons, tactics, and military administration around that time. Tibet, Nanzhao and Vietnam are also serious blind spots that I hope to fill in a bit. What are some good places to start? I'm particularly interested in how the troops were recruited, organized and led, seeing as this is a project for a grand strategy game. Tactical or technical differences are less important.