Ferdinand I of Aragon vs Julius Caesar

Ferdinand I was elected King of Aragon by the Compromise of Caspe, a commission of nine representatives from Aragon, Catalonia, and Valencia. This resolved the succession crisis following the death of Martin I without a direct heir, bringing the Trastamara dynasty to the Aragonese throne.

Ferdinand I launched a military campaign to subdue the rebellious Sardinian nobles who had resisted Aragonese rule. The campaign successfully reasserted Aragonese control over the island, consolidating the Crown of Aragon's Mediterranean possessions.

Ferdinand I implemented administrative reforms in the Crown of Aragon, including the reorganization of the royal council and the standardization of tax collection. These reforms strengthened royal authority and improved the efficiency of governance across the diverse territories of Aragon.

Caesar, as proconsul of Gaul, launched a series of campaigns that conquered all of Gaul (modern France, Belgium, and parts of Switzerland). He fought numerous battles, including against the Helvetii, the Belgae, and the Gallic chieftain Vercingetorix. The wars brought immense wealth and a loyal army to Caesar.

Caesar led Legio XIII across the Rubicon River into Italy, defying the Roman Senate's order to disband his army. This act triggered a civil war against Pompey and the Optimates, ultimately leading to Caesar's dictatorship and the end of the Roman Republic.

Caesar's outnumbered army defeated the larger forces of Pompey the Great at Pharsalus in Greece. Caesar's tactical use of a reserve line to counter Pompey's cavalry charge proved decisive. Pompey fled to Egypt, where he was assassinated, leaving Caesar as the undisputed master of the Roman world.

The Roman Senate appointed Caesar dictator perpetuo (dictator for life), granting him unprecedented personal power. This move concentrated military, legislative, and judicial authority in one person, effectively ending the Roman Republic's traditional system of checks and balances and alarming many senators.

A group of Roman senators, led by Marcus Junius Brutus and Gaius Cassius Longinus, stabbed Caesar to death at a meeting of the Senate in the Theatre of Pompey. The assassination was intended to restore the Republic, but instead triggered another civil war that led to the rise of the Roman Empire.