Question

With the fall of communist governments in the 1990s, what kinds of problems have arisen in what places

Answer 1

The  kind  of  problem  that  arise  after  the  fall  of  communist  government  is  creation of  new  boundaries  
New  government  tried  to  take  control  of  the  countries
The  countries  which  has  this  communism  ties  to  the  government  experienced  lack  of  security  and  law

Answer 2

Political unrest amongst other issues occured in the Balkans (Soviet Union, Yugoslavia, Czechoslovakia) in these places peace could not be gotten by the usual means because of how those countries or states were structured. Countries were dismantled because minority ethnicities opposed dominance by majority ethnicities