The Secretary of War was Edwin McMasters Stanton.
Stanton has been described as difficult to work with, and there might have been some personality conflicts; Johnson wanted to replace him with General Grant (who declined the position). Lincoln had appointed Stanton and while the Civil War was going on, Stanton had developed a lot of influence and power.
Edwin M. Stanton was the Secretary of War under Lincoln that Johnson removed from office.
He tried to replace Edward Stanton.
Johnson tried to remove war secretary from office but he refused it. The secretary was known as Edwin Stanton and has also served as the war secretary under Lincoln's regime.
President Johnson tried to fire the Secretary of War, Edwin Stanton to test the Tenure of Office Act.
he tried to fire the secretary of war
Andrew Johnson.
President Andrew Johnson.
Johnson suspended Secretary of War Stanton
Johnson's attempt to fire Secretary of War Edwin Stanton
He held the position of Secretary of War until he was removed unconstitutionally by Andrew Johnson which then the Tenure of Office Act was still active could have had him impeached for doing so.
impeach him
Andrew Johnson was impeached for firing Secretary of War Edwin M. Stanton, in violation of the 1867 Tenure of Office Act. The Act provided an official who had been appointed to office with the "advice and consent" of the Senate could only be removed with the permission of the Senate.