Which was the immediate cause of the impeachment of president andrew johnson? a. his dismissal of secretary of war, edwin stanton b. his veto of the freedmen’s bill c. his sending of troops to southern states

A. his dismissal of Secretary of War, Edwin Stanton .

Explanation: When President Andrew Johnson officially dismissed the Secretary of War Edwin Stanton, the House of Representatives voted to impeach him.

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".