The Third Macedonian War reference article from the English Wikipedia on 24-Apr-2004
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Third Macedonian War

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The Third Macedonian War (171 BC - 168 BC) was a war fought between Rome and King Perseus of Macedon. After some successes, Perseus was finally defeated by the legions of the Roman general Lucius Aemlius Paullus at the Battle of Pydna in 168 BC. Perseus was deposed, and Macedon divided into four Roman client republics.