Robert Fico

In 2009, Hungary's President Laszlo Solyom was barred from visiting an ethnic Hungarian community in Slovakia because of alleged security risks. So the quiet, mild-mannered man walked to the middle of a bridge over the Danube River that separates the Central European nations and — in an unusually forthright manner — declared that the "hysteria" had to end. But the simmering mistrust and rivalry is very much alive.On Tuesday, the European Union's highest court stepped in and ruled in Slovakia's favor over the decision to bar Solyom. But some other issues — dating back centuries — are less easy to resolve. Here's a look at some of the main points of contention.SLOVAKIA - OR UPPER HUNGARY?For centuries, Hungary ruled large swathes of central Europe until losing two-thirds of its territory and half its population in the peace treaties at the end of World War I. In fact, the modern-day Slovak capital, Bratislava, was the capital of the Kingdom of Hungary for nearly 250 years until 1783. Som...

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