Source 21

http://www.geocities.com/CollegePark/Union/7050/tang.html
this website is by Yifan, i dont know the credentials of this person but this website gives you a list of all the emporer of the tang dynasty and discribes how each of them ruled and when they were killed, it also tells you a litte bit of info about there military, yes because i have read information like this before.