 In one incident during the aforementioned African invasion thirty of Caesar's Gallic horsemen drove off a much larger force of Moorish cavalry, while in another a squadron of Caesar's heavy Iberian horsemen routed a large body of Labienus's Numidians, while his Gallic and Germanic horsemen stood their ground.The Numidians were extremely useful during small wars, and their presence certainly contributed greatly to the effectiveness of Hannibal's reconnaissance and intelligence.Hannibal's invasion of Rome during the Second Punic War is best known for his use of slow-moving war elephants, but he also employed Numidian cavalry where faster movement was needed, such as luring the Romans into a trap at the Battle of Trebia and for fighting on his right flank.