In what ways did colonial rule contribute to the decline of the powers of the traditional rulers in West Africa?

Before colonial rule, traditional rulers in West Africa (obas, emirs, chiefs and natural rulers) exercised wide executive, legislative, judicial, military and religious powers over their peoples. Colonial rule greatly reduced these powers in the following ways:

1. Loss of sovereignty to the colonial power: Once a territory was annexed, ultimate authority passed to the colonial government. Traditional rulers ceased to be independent sovereigns and became subordinate agents of the colonial administration.
2. Subordination through indirect rule: Where indirect rule was applied, chiefs governed only as instruments of the colonial power, under the supervision and direction of colonial officers (Residents and District Officers) who could over-rule them.
3. Deposition and appointment of rulers: The colonial authorities acquired the power to appoint, depose, suspend or exile rulers. A ruler who resisted could be removed, so kingship depended increasingly on colonial approval rather than on custom alone.
4. Loss of military power: Colonial governments disbanded the traditional armies and monopolised the use of force through their own police and soldiers, stripping rulers of their war-making and defensive authority.
5. Loss of judicial powers: The establishment of colonial courts and the introduction of English (or French) law limited the jurisdiction of traditional courts. Native courts operated only under colonial control, and appeals lay to colonial courts.
6. Loss of control over taxation and finance: Colonial governments took over the assessment and collection of taxes and controlled public revenue, so rulers lost their former financial independence and were often reduced to salaried officials.
7. Reduction of legislative power: Law-making authority passed to colonial legislatures and governors, so the customary law-making role of the rulers and their councils was curtailed.
8. Erosion of religious and spiritual authority: The spread of Christianity and Western education, together with colonial disregard for traditional religious sanctions, weakened the sacred aura on which the authority of many rulers had rested.
9. The French policy of assimilation and direct rule: In French territories, chiefs were reduced to mere administrative agents (chefs de canton) who could be transferred at will, and traditional institutions were largely disregarded.