Caesar’s military exploits were only a means to an end; political power was what he craved. Upon his death he was the most powerful man in the world, he had achieved his aims, but displayed a naivety in believing he was safe from violence.

If he had lived as Dictator for life I doubt whether a conquest with Parthia would have been at the forefront of his agenda. Perhaps a short war to rape Parthia of its wealth, but certainly not a war of conquest; strategists of the time (as Augustus would realise) thought the boundaries of the Empire were already stretched to their limits.

In my mind a campaign with Spain would had been the most probable recourse for military action. The province was still very much unsettled and was not fully quelled until Augustus turned the Empire’s resources against the elusive rebels.

Had Caesar lived longer he would have become the first Emperor instead of his adopted nephew. This would most likely have either resulted in a large proscription of the people and nobles as Octavian carried out, or his assassination, as proved to be the outcome. Romans had a strong hatred of Kings and Tyrants, Caesar was a military genius and shrewd politician, but no matter his disposition the populace would not idly stand by as their already limited ‘democracy’ was taken from them.