Along with Jim crow laws, what other important event contributed to the removal of rights freedmen and african americans gained during reconstruction

Along with Jim crow laws, Segregation became a state sponsored policy.

Explanation:

The Jim Crow laws allowed local laws to exist and discriminate against the freed and African american population. This resulted in a situation where the local racist laws could abide and the segregation policies of various places can control the black populations.

During the 19th and 20th century the black population was segregated from common places completely and even though they could live alongside the white population they were effectively taken out of the public sphere as any would want.