Final answer:
The Roman defeat at the Battle of Cannae led to great losses and potential defections from allies. Rome fortified itself and raised new armies, successfully adapting new strategies that eventually led to victory in the Punic Wars.
Step-by-step explanation:
Following the Roman defeat at the Battle of Cannae, one of the most catastrophic military losses in Roman history, the aftermath was grim for Rome. The battle, which took place during the Second Punic War in 216 BCE, saw the Carthaginian general Hannibal defeat a much larger Roman army with brilliant tactics. As a result, the Roman military suffered significant losses, and many Roman allies began to consider defecting to Hannibal's side, putting the continuity of the Roman Republic in jeopardy.
Rome responded to the defeat with resolve; they avoided confronting Hannibal in pitched battles and instead engaged in a war of attrition. They fortified their city and raised new armies to replace the ones lost. This strategy, coupled with the eventual leadership of generals like Scipio Africanus, would ultimately lead Rome to victory in the Punic Wars.
Historical records and archaeological findings, such as mass graves and relics from the battle, help us understand the scale of the conflict and the impact it had on Rome's military strategies and alliances going forward.