Determine the question that you might have asked to get back the following answer for the given context
Context: The Romans held off Hannibal in three battles, but then Hannibal smashed a succession of Roman consular armies. By this time Hannibal's brother Hasdrubal Barca sought to cross the Alps into Italy and join his brother with a second army. Hasdrubal managed to break through into Italy only to be defeated decisively on the Metaurus River. Unable to defeat Hannibal on Italian soil, the Romans boldly sent an army to Africa under Scipio Africanus to threaten the Carthaginian capital. Hannibal was recalled to Africa, and defeated at the Battle of Zama.;
Answer: the Battle of Zama;
Question:
In which battle was Hannibal clearly defeated at?
The context tells that Hannibal, the great Carthaginian general was recalled to Africa and defeated at the Battle of Zama.
Since this is a decisive victory for Rome, this can be seen as the end or climax of their war against each other. 
Therefore we need to ask: "In which battle was Hannibal clearly defeated at?".