Instructions: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Input: The Roman Kingdom was the monarchical government of the city of Rome and its territories .
Output:
The Roman Kingdom , also referred to as the Roman monarchy , or the regal period of ancient Rome , was the earliest period of Roman history , when the city and its territory were ruled by kings .