Military campaigns Andriscus' reign was defined to a significant degree by his military campaigns, due to his being in a constant state of war with Rome. After his conquest of the Kingdom, he enlarged the army and began campaigns to conquer
Thessaly, a key part of the realm of the old
Antigonids. Initial resistance to him were from
ad hoc forces of Roman allies in Greece, a few Roman units and legates in the region and some resistance from the remnants of Rome's client republics in Macedon, some elements of which seem to have survived for some time into his reign. Soon, however, the Romans sent a legion under the praetor Publius Juventius Thalna to defeat the pretender. Thalna, however, appears to have underestimated Andriscus' strength, not taking into account the fact that the king's army had grown dramatically since his enthronement. Andriscus attacked and fought him at an unspecified location in Thessaly (Dio gives it as "near the borders of Macedon"); details of the engagement are scarce, but Thalna was killed and his forces almost annihilated. It was the worst defeat Rome would suffer at the hands of the Macedonians; Florus remarks on the irony of how "they that were invincible against real kings, were defeated by this imaginary and pretended king". The victory greatly increased the king's prestige; he obtained an alliance with
Carthage, and his domestic popularity was increased dramatically, allowing him to stamp out republican resistance and conquer Thessaly.
Foreign policy At first, Andriscus attempted to negotiate his position with Rome, but when it became clear that they would not recognize his throne, he embarked on a strongly anti-Roman policy, He continued to cultivate his relations with his Thracian allies, to whom he owed his throne; they would continue to provide significant forces for him during his reign. Foreign interest in relations with him increased dramatically after his victory over Thalna; as mentioned before,
Carthage, which was under attack from Rome in the
Third Punic War, allied itself to him and promised him money and ships, though these could not be sent before his ultimate defeat. Significant sympathy, possibly cultivated to a degree by him, arose in
Greece; however, the
Achaean League remained pro-Roman and continued to resist and fight him. King Attalus II Philadelphus of
Pergamon remained staunchly pro-Roman; the Pergamenes were terrified of the prospect of a revived and strong Macedonia on their doorstep.
Domestic policy Domestically, Andriscus implemented a strongly anti-Roman and anti-Republican policy. Ancient historians interpreted this as his cruelty and tyranny; it has been suggested that these were simply manifestations of his anti-Roman policy and his persecutions of his opponents, including pro-Roman republicans. At the same time, it is also possible that he was indeed tyrannical. His persecutions increased significantly after his victory over Thalna, costing him significant popularity; this would have dire consequences for him later.
Coinage The extent and nature of Andriscus' coinage is a matter of debate. It has been suggested that many of his coins were
overstrikes of previous Antigonid, republican and Roman coinage. He issued a very small amount of silver
drachmae, on which he pictured himself as a Hellenistic king, and added
Herakles on the reverse. Only three coins of Andriscus are known, two of which are overstruck, one on a drachm of the
Thessalian League, the other on a Roman
denarius. It is therefore possible that he also used the denarii he seized as booty after his victory against Thalna to mint his own coins. The coins are also of poor quality, due to the short duration of his reign, the need to reuse old dies and the need to quickly produce wartime coinage. Some non-royal coinage has also been discovered and dated to the period of his reign, possibly struck by the remnants of the pro-Roman republics. It has also been suggested that the king was more liberal than implied by the sources, and allowed some degree of independent coinage. ==Downfall and death==