Long-standing rivalry between two countries often results in war, conflict, sanctions, or threats thereof. Indeed, overt suspicion, ingrained distrust, and impassioned dislike of one nation by another are among the root causes of some of the most enduring clashes of culture and ideology witnessed by history. And when these disputes boil over, bad blood is spilled with little love lost.
So, which countries have the greatest rivalries? Click through and read about the issues dividing these nations.