For the final attack commencing on 8 May 1925, the French and Spanish had ranged 123,000 men, supported by 150 aircraft, against 12,000 Rifians. Superior manpower and technology soon resolved the course of the war in favour of France and Spain. The French troops pushed through from the south while the Spanish fleet and army secured Alhucemas Bay by an amphibious landing, and began attacking from the north. After one year of bitter resistance, Abd el-Krim, the leader of both the tribes, surrendered to French authorities, and in 1926 Spanish Morocco was finally retaken.
Question: How many tribes was Abd el-Krim the leader of?
Answer: 2