What was the cause of the fued between Henry 4 and Pope gregory 7?

Morning how ur day and quick question who started the civil war?

Was the first african american to be appointed to the u. s. supreme court.

Which of the following was used only once, to ratify the 21st amendment (repealing prohibition)? a. three-fourths of both houses of congress. b. three-fourths of the state legislature approved it. c. two-thirds of the state legislature approved it. d. ratifying conventions in three-fourths of the states approve it.