Analysis of information sources in references of the Wikipedia article "மூன்றாம் அந்தியோகஸ்" in Tamil language version.
The difference is that from the perspective of Antiochus III, the Greek king of a Greek empire, or from the later point of view of a head of state communicating with a Greek city-state
...in the autumn of 192 BC they heard that Antiochus III had crossed over to Greece with his army and declared himself the champion of Greek freedom against Roman domination.
ANTIOCHUS III THE GREAT c242-187 BC Seleucid king Antiochus III the Great was the sixth king (223-187 BC) … Antiochus landed on the mainland of Greece posing as a champion of Greek freedom against the Romans (192 BC).