they faced few invasions because,of the acess to Egypt and nubia.
Cosmic Crusader happened in 1982.
Star Crusader happened in 1994.
Galactic Crusader happened in 1990.
Crusader of Centy happened in 1994.
Light Crusader happened in 1995.
Crusader Kings II happened in 2012.
Hungarian invasions of Europe happened in 800.
Mongol invasions of Tibet happened in 1240.
Mongol invasions of Vietnam happened in 1257.
Mongol invasions of Syria happened in 1260.
Caesar's invasions of Britain happened in -54.