What was the greatest imperial accomplishment?

The Roman Empire (Latin: Imperium Romanum, Senatus Populusque Romanus or Res publica populi romani)note 1 was the third period of Roman civilization in classical antiquity, after the Roman Republic and characterized by a form of autocratic government. The birth of the Empire is preceded by the expansion of its capital, Rome, which extended its control around the Mediterranean Sea

Explanation:

-an amendment is proposed.

-two-thirds of congress must approve.

-thee-quarters of states must approve.

-the proposed amendment becomes law.

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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".