Sundiata Keita known as the hungering lion led a Mande revolt against the powerful Soso king
There are no example choices to choose from, so here goes some of my background knowledge. They moved out onward because of the great depression because it was a time of cause. Others even claimed that they contributed to the depression, making it even hard for Africans to live peacefully. They moved to get away from the drama and build their new crops and start a new life.
Nazism begins (1933)
Hitler's move into Poland (1939)
lend lease (1941)
pearl harbor (1941)