Romulus and Remus found the city of Rome. Romulus killed Remus and became the ruler and named the city by himself. Rome was ruled by kings for the next 240 years.
The last king is overthrown and Rome is now ruled by elected officials called senators. There is a constitution with laws and a complex republican government.
Hannibal leads the Carthage army in his famous crossing of the Alps to attack Rome. This is part of the second Punic war.
Spartacus the gladiator leads the slaves in a uprising.
Caesar makes his famous crossing of the Rubicon and defeats Pompey in a civil war to become the supreme ruler of Rome.This signals the end of the Roman Republic.