Based on the timeline of the Punic Wars provided, the event that completes the blank on the timeline is:
Roman army defeats the Carthaginians at the Battle of Zama.
Here's why:
1. The Battle of Zama took place in 202 B.C., which fits the timeline between 216 B.C. and 146 B.C.
2. This battle marked the decisive defeat of the Carthaginian forces led by Hannibal by the Roman army under the command of Scipio Africanus.
3. Following this victory, Carthage was forced to surrender its navy and territory in Spain as part of the peace treaty that ended the Second Punic War.
4. Therefore, the completion of the timeline with the Roman army defeating the Carthaginians at the Battle of Zama is historically accurate and aligns with the events of the Punic Wars.