 Khalifate units use no magic, but instead rely on careful use of terrain and coordinated strikes around dusk or dawn.The Islam-inspired Khalifate faction is still under development.David White began development of "Wesnoth" because he wanted to create a freely available, open source strategy game with very simple rules, but one that had difficult to beat artificial intelligence and that was challenging and fun — a game that was easy to learn but hard to master.