What statement describes the impeachment of president Andrew Johnson?

The impeachment of President Andrew Johnson in 1868 stemmed from his violation of the Tenure of Office Act, particularly his attempt to remove Edwin M. Stanton, the Secretary of War, from his position. The House of Representatives impeached him, making him the first U.S. president to be impeached. Johnson was acquitted by the Senate, falling just one vote short of the two-thirds majority needed for removal from office. His impeachment highlighted the intense political conflict during the Reconstruction era following the Civil War.