There's six divisions:
Top Division:
Canada
United States
Finland
Slovakia
Germany
Sweden
Russia
Switzerland
Czech Republic
Denmark
Division 1A:
Belarus*
Norway
Latvia
Italy
Austria
Slovenia^
Division 1B:
Kazakhstan*
Ukraine
Poland
France
Japan
Hungary^
Division 2A:
Great Britain*
Lithuania
South Korea
Netherlands
Estonia
Romania^
Division 2B:
Croatia*
Spain
Australia
Belgium
Serbia
Iceland^
Division 3:
China
Mexico
New Zealand
South Africa
Turkey
* moves up a division
^ relegated for 2016
The bottom two teams from the World Juniors (Top Division) play a relegation round the loser is replaced by the winner of the Division 1A tournament, so next year Belarus will be in the 2016 World Juniors.
Arizona State looks to have taken a recruit right out of Wisconsin's backyard. Brett Gruber sounds like he also had interest from big name programs so UND might have been looking at him.