Answer: After
Step-by-step explanation:
The assassination of Julius Caesar after occurred the Beginning of the Punic Wars.
Around 46 years before Julius Caesar was born, the Romans fought the last of the Punic wars with Carthage, a rival power in Africa that had challenged Rome for dominance in the Mediterranean sea.
There were 3 wars in total and they were fought over 118 years with Rome almost being wiped out in the Second Punic war but due to some hesitancy on the part of the Carthaginians, the Romans recovered and handed them a significant defeat that made them a vassal of Rome. Carthage was then completely destroyed in the Third Punic War.
All this happened before Julius Caesar was born so it is safe to say that he was assassinated after the beginning of the wars.