Iam
why was the roman empire divided into two halves?
the empire was split up based on cultural and religious beliefs.
it was difficult to protect one large empire against invasions.
each half could more easily conquer other countries if they were apart. government officials disagreed over how to rule and thus split up.

The Roman Empire grew to be huge.  It covered most of Europe, North Africa, and parts of Asia.  Just getting messages from Rome to the outer parts of the Empire took weeks.  The Empire had become too large to rule effectively.  The outer provinces were pretty much doing whatever they wanted.

Emperor Diocletian was looking for a way to fix this and other problems.  He decided that the only thing to do was to actually break the empire into two pieces.

the federalist party which advocated strong centralization dominated the united states government till 1800. so 1800 election transformed the power from one party to another party for the first time and was thus a turning point in american history. so jefferson called it "revolution of 1800".

explanation:

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.