Why did Roman people joined Hannibal and his armies?

Hasdrubal, recognizing that Spain was a lost cause, crossed the Alps to join Hannibal in Italy for a united attack on Rome. At the Battle of the Metaurus River in 207 BCE, however, Hasdrubal's army was defeated by the Romans under Gaius Claudius Nero (c. 237-199 BCE); Hasdrubal was killed and his forces scattered.

Explanation:

the united states constitution is the supreme law of the united states. the constitution, originally comprising seven articles, delineates the national frame of government. its first three articles embody the doctrine of the separation of powers, whereby the federal government is divided into three branches: the legislative, consisting of the bicameral congress; the executive, consisting of the president; and the judicial, consisting of the supreme court and other federal courts. articles four, five and six embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relationship to the federal government, and the shared process of constitutional amendment. article seven establishes the procedure subsequently used by the thirteen states to ratify it. it is regarded as the oldest written and codified national constitution in force.

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