Bueno, con los macedonios relación tuvieron.... (wikipedia)
"Celtic expansion reached the Carpathians in the beginning of the 4th century BC. According to a Livy, perhaps based on Celtic legend, the Celts that migrated to Italy and Illyria numbered 300,000. The Celts established themselves in Pannonia, subjugating the Pannonians, and in the end of the 4th century they renewed raids into the Balkans. By the early 3rd century BC, Pannonia had been Celtiziced. The Celts, retreating from Delphi (280–278 BC), settled on the mouth of the Sava and called themselves Scordisci. The Scordisci established control to the north of the Dardani. There is no mention of the Scordisci until the reign of Philip V of Macedon (r. 221–179 BC), when they emerge as Macedon allies against the Dardani and Rome. The Scordisci, having conquered the important Sava valley, the only route to Italy, in the second half of the 3rd century BC, "gradually became the most important power in the northern Balkans".
They controlled the various Pannonian tribes in the region, extracting tribute and enjoying the status of the most powerful tribe in the central Balkans (see the tribes of Triballi, Autariatae, Dardanians and Moesians), and they erected fortresses in Singidunum (today's city of Belgrade) and Taurunum (modern Zemun). They subjugated a number of tribes[when?] in Moesia, including the Dardani, several west Thracian tribes and the Paeonians.