Question

after which war did the ku klux klan first emerge?
the civil war
complete
what government act helped put an end to the ku klux klan’s activities?
the act
retry

Explanation:

The Ku Klux Klan's violent, discriminatory activities in the post-Civil War South prompted federal intervention. The Enforcement Act of 1871 (also called the Ku Klux Klan Act) gave the federal government authority to prosecute Klan members, use military force to suppress the group, and protect the civil rights of Black Americans, effectively dismantling the first iteration of the Klan.

Answer:

Ku Klux Klan (or Enforcement)