What did the Persian and Assyrian Empires use to maintain communication in their vast empires?

Which country experienced a noncommunist revolution for independence in the years after world war i?

How did disease impact the human death toll during this time period? disease killed more people than combat during this time. disease steadily increased as the war hospitals were attacked. improvements in medical technology decreased illness overall. disease was a small but significant contributor to deaths at this time.

At which battle did the duke of wellington defeat napoleon?