This was made possible by the creation of new monastic orders that enabled men to be both monks and knights. While members of these orders were expected to abjure all wealth and property, to attend Mass multiple times a day, to fast, pray, and eat in silence, and to live in controlled communities cut off from the outside world, especially women, members were not required to give up the profession of arms. Rather, these orders were designed to capture the religious zeal of the time and funnel the fervor and energy of fighting men into religious channels.
Before this spirit if militant Christianity had burned itself out, no less than 17 military orders, 8 on the Iberian Peninsula, 2 in what is now Italy, and 2 in German speaking Europe had been founded. The most famous and most powerful militant orders, however, were the Templars and the Hospitallers, both founded in the Holy Land and international in their structures and membership.
The Militant Orders play an important role in my three-part biography of Balian d'Ibelin: