Complex sentence: During the "interwar period," Kufra was an important trade/travelling route for various nomadic desert people including the Senussi who made the oasis their capital at one point in response to encroaching British, Italian and French designs on the region.
Split into simpler sentences: During the "interwar period," Kufra was an important trade/travelling route for various nomadic desert people including the Senussi. The Senussi made the oasis their capital at one point in response to encroaching British, Italian, and French designs on the region.