How did white Louisianians ensure racial
oppression of African-Americans was no
challenged?

During Reconstruction, the federal government expanded the vote to blacks in the South, and provided some equal protection to black citizens. As Reconstruction failed, however, white supremacists began to use violence and intimidation to oppress blacks. When whites re-gained control of Southern states’ governments, they began to enact laws that oppressed blacks through segregation and disenfranchisement.

the folsom i believe