When was the Roman Empire divided into two halves?

285 AD

Explanation:

In 285 AD, Emperor Diocletian decided that the Roman Empire was too big to manage. He divided the Empire into two parts, the Eastern Roman Empire and the Western Roman Empire. Over the next hundred years or so, Rome would be reunited, split into three parts, and split in two again.

Explanation:

; in particular, this term is used in historiography to describe the period from 395 to 476, where there were separate coequal courts dividing the governance of the empire in the Western and the Eastern provinces, 

i think the answer is : the declaration of rights and grievances

hope i

-lavira : )