During the Second Punic War with Carthage, Rome's earliest known annalists Quintus Fabius Pictor and Lucius Cincius Alimentus recorded history in Greek, and relied on Greek historians such as Timaeus. Roman histories were not written in Classical Latin until the 2nd century BC with the Origines by Cato the Elder. Contemporary Greek historians such as Polybius wrote about the rise of Rome during its conquest of Greece and ascension as the primary power of the Mediterranean in the 2nd century BC. Moving away from the annalist tradition, Roman historians of the 1st century BC such as Sallust, Livy, and even Julius Caesar wrote their works in a much fuller narrative form. While Caesar's De Bello Gallico focused specifically on his wars in Gaul, Roman works that served as a broad universal history often placed heavy emphasis on the origin myth of the founding of Rome as a starting point. These works formed the basis of the Roman historiographic models utilized by later Imperial authors of the Principate era, such as Tacitus and Suetonius.