In B.C.34, four years after Pharsalia, having put down all his domestic enemies, and arranged matters, as he thought, satisfactorily at Rome, he let a decree be passed formally assigning to him "the Parthian War," and sent the legions across the Adriatic on their way to Asia.

What plan of campaign he may have contemplated is uncertain; but there cannot be a doubt that an expedition under his auspices would have been a most serious danger to Parthia, and might have terminated in her subjection.
The military talents of the Great Dictator were of the most splendid description; his powers of organization and consolidation enormous; his prudence and caution equal to his ambition and his courage.

Once launched on a career of conquest in the East, it is impossible to say whither he might not have carried the Roman eagles, or what countries he might not have added to the Empire.

But Parthia was saved from the imminent peril without any effort of her own.

The daggers of "the Liberators" struck down on the 15th of March, B.C.44, the only man whom she had seriously to fear; and with the removal of Julius passed away even from Roman thought for many a years the design which he had entertained, and which he alone could have accomplished.
In the civil war that followed on the murder of Julius the Parthians are declared to have actually taken a part.