In the year 1000-1999 As the era of things still not developed Communication and transportation that have access to make the communications of people in the era it was difficult.
In the years 1000-1999 An era where things are still not developed. Communications and Transport not reached. The communication of the people of that era, is difficult.
In the years 1000-1999 is the generation of them that things are still not developed. Communication and transportation also reached. The communication of the people in that era is difficult.