 Boumédiène's army, built up outside the war zone in Morocco and Tunisia, quashed resistance among GPRA loyalists and guerrilla units inside Algeria, as it moved in from its border area bases.Khider then took on the role as Secretary-General of the post-war Party of FLN, with control over finances, but quickly fell out with President Ben Bella.Among the causes were political differences, personal rivalries, and opposition to Ben Bella's increasingly autocratic rule.