The freedmen's bureau is most associated with which time period?

 The period of RECONSTRUCTION after the Civil War.

Context/detail:

The Freedmen's Bureau was established by Congress in 1865, in the aftermath of the Civil War.  The aim of the Bureau was to provide assistance to former black slaves (as well as poor whites) in the South during the Reconstruction period.  The Freedmen’s Bureau provided food and housing, established schools, and made medical and legal assistance available.  There was an intention of settling former slaves on land confiscated or abandoned during the war, but that didn't materialize. Radical Republicans took over dominance in Congress and they determined that confiscated lands in the South should be returned to their original owners.

i receive this honor with deep gratitude and great humility. it is an award that speaks to our highest aspirations — that for all the cruelty and hardship of our world, we are not mere prisoners of fate. our actions matter, and can bend history in the direction of justice.

this is a way. : )