That’s one of the things that I loved about “Kingdom of Heaven”. Ridley Scott decided that the armor, weapons and clothing needed to look like mid to late 12th century armor, weapons and clothing. So (with the exception of the Muslims having trebuchets) it was really close to accurate. Allowed me to enjoy the movie that much more.
The REAL story of Balin Ibelin, Guy of Lusignon and Sybill Princess of Antioch is much better than the Hollywood farce Scott presented.