<p><b>This intriguing book describes the Romans'' formidably warlike enemies in modern Romania and Bulgaria ¿ their ''most illustrated'' opponents, thanks to friezes on Trajan''s Column and carvings on Trajan''s Adamklissi monument.</b><br><br>Formidable warriors, able to field tens of thousands of infantry and cavalry and led by a military aristocracy, the Dacians and Getae presented a real threat to Rome''s north-eastern frontier. They inflicted several defeats on Rome, crossing the Danube to invade the province of Moesia, and later stubbornly resisting counter-invasions from their strong mountain fortresses.<br><br>Historians believe that the Dacians and Getae were essentially the same group of tribes during successive periods, related to Thracian tribes from territory south of the Carpathian Mountains, but their exact relationship in place and time is a subject for debate. Those called the ''Getae'' by ancient Greek sources were actively expanding by at least the 4th century BC; so