what was the seleucid empire
The Seleucid Empire was the Persian kingdom of the Macedonian dynasty of the Seleucids, whose rule began with the collapse of Alexander 's empire and faded away between Roman and Parthian growth of power in the 1st century BCE.ntiochos III's death marked the end of the Seleucid Empire as a great power. The kingdom fell once more into dynastic struggles, and the eastern provinces were gradually lost due to rebellions and Parthian expansion.