21.   But both battles are really about the serious tensions that have erupted between the United States and a Europe newly unified by a common currency.

22.   But even as Doom and its successor, Quake, became wildly successful, a fundamental disagreement erupted between their creators about what made a computer game great.

23.   But somehow, a heated nose-to-midsection argument erupted between coach and superstar.

24.   Clashes erupt between workers who want more and businesses and governments that fear that rising wages will drive away jobs to even-lower-wage countries.

25.   Civil war erupted between the Yugoslav army and the fledgling Croatian military.

26.   Earlier this month, renewed fighting erupted between the two main rival Kurdish factions, the Patriotic Union of Kurdistan and the Kurdistan Democratic Party.

27.   Earlier in the day, a heated exchange erupted between Bailey and Clark about a defense witness.

28.   Friends of Dorris said on Tuesday that the sexual abuse complaint emerged in recent months as a custody battle erupted between Dorris and Ms. Erdrich.

29.   Friends of Dorris said Tuesday that the sexual abuse complaint emerged in recent months as a custody battle erupted between Dorris and Ms. Erdrich.

30.   Given their towering egos, what better place for the long smoldering enmity to erupt between the skyscraper moguls Donald Trump and Harry Helmsley than the Empire State Building?