Once you have defined your areas and regions, you need to assign regions to countries, and countries to areas.
Use the Define Territory Hierarchies window.
In the Parent Territory Type field, select Country.
In the Code field, select a country that you have created.
In the Child Territory region, select the regions you want to associate with the selected country.
Repeat for other countries as necessary.
Save your changes.
In the Parent Territory Type field, select Area.
In the Code field, select an area that you have created.
In the Child Territory region, select the countries you want to associate with the selected area.
Repeat for other areas as necessary.
Save your changes.