Answer:
Western Europe and Eastern Europe.
Step-by-step explanation:
The two countries include 'western europe' and 'eastern europe' were ruled by the relatives of Northern Vikings. The vikings from Scandnavia used to trade across distinct areas and homelands of Northern Europe and also explored the Eastward and western regions. They invaded both these regions which are presently known as Sweden, Denmark, and Norway and settled in these areas and also across Canada and Greenland. The period is popularly known as viking age.