Final answer:
Freedom colonies, acts of self-emancipation, petitions for freedom, and involvement in abolition characterized black Americans' endeavors to experience freedom post-Civil War.
Step-by-step explanation:
One measure of black efforts to experience freedom following the Civil War was the establishment of "freedom colonies". These were unorganized rural settlements created by former slaves, intended as refuges from violence and institutional racism, signaling a desire for self-determination and community autonomy. However, the harsh realities of the time, including the threat of violence, racial profiling, and the struggle to acquire land legally, made it difficult for these freedom colonies to flourish. Additionally, the acts of self-emancipation, mass petitions, and participation in abolition movements represent significant measures through which black individuals and communities sought to actualize their freedom and claim their rights as citizens.