Maybe because a peril of indifference that happened with Wiesel's situation was that the soldiers who freed them and that experience has fallen into a kind of forgotten obscurity I suppose, in the full of scheme of what happened.
Answer:
In 1851, the United States government began to introduce a Concentration Policy. This strategy would provide white settlers with the most productive lands and relocate Indians to areas north and south of white settlements. Over the next decade, Indians were evicted from their land to make way for a white society.
On June 16, 1976 the Soweto Students Uprising began (Soweto is a neighborhood of Johannesburg). Around 20,000 students went to the streets and made a peaceful protest opposing to Afrikaan as the official language for instruction in schools. The government's responde was violence, killing hundreds of students, as a result, the revolt spread through the whole country and carried on until the following year. These events changed the socio-political landscape in South Africa which main problem was the Apartheid.