The number of colonial troops increased in the second half of the First World War. After suffering heavy casualties in the first phase, a new doctrine emerged. Colonial troops were to fight alongside soldiers from European countries to minimize defections and casualties.
The massive recruitment of men from North and West Africa to participate in World War I came with numerous challenges. For instance, the French saw a drop in the number of volunteers and the military resorted to coerced recruitment. This approach faced opposition from many people.
In West Africa, rich and influential Africans would resort to handing over their servants and slaves to the recruiting officers to spare their family members from participating in the war. Resistance came in many forms; for instance, there were cases of self-mutilation, fleeing into Liberia, the Gold coast, Guinea or even into the dense forests. In some instances, armed rebellion cropped up to fight the colonial powers taking people to fight in the First World War.