October 23 in History

Brutus's army collapsed at Philippi in 42 BC, three weeks after his co-commander Cassius had killed himself following a defeat. Brutus ran himself through with his sword after the battle. Mark Antony covered his body with his own cloak. Brutus had assassinated Caesar two years earlier to save the Republic. His death ended the Republic forever. Octavian became Augustus, Rome's first emperor.

The Second Battle of Philippi in 42 BC was a decisive confrontation in the Liberators' civil war, where Mark Antony and Octavian defeated the forces led by Brutus, leading to Brutus's suicide. This battle was critical in the power struggle following Julius Caesar's assassination and marked the decline of the Roman Republic, paving the way for the rise of the Roman Empire.

Mark Antony and Octavian crush Brutus's forces at Philippi, driving the conspirator to take his own life. This decisive victory extinguishes the last organized resistance against the Second Triumvirate, allowing Rome to transition from a fractured republic into an empire ruled by Caesar's heirs.

The Synodus Palmaris cleared Pope Symmachus of all charges. King Theoderic the Great had called the council after rivals accused Symmachus of celebrating Easter on the wrong date and misusing church funds. Antipope Laurentius claimed the throne. The council ruled a pope couldn't be judged by anyone. Symmachus kept power. The principle that popes answer to no earthly authority was established.

The Synodus Palmaris acquitted Pope Symmachus in 502 of all charges brought by Antipope Laurentius, ending a four-year schism. Gothic King Theodoric the Great called the synod in Rome and presided over it — a barbarian king judging a pope. Symmachus had been accused of celebrating Easter on the wrong date and misusing church funds. The synod declared no earthly court could judge a pope. The principle stood for centuries.

The Almoravids crush Castilian forces at the Battle of Sagrajas, halting Christian expansion into southern Spain for decades. This decisive victory prevents the immediate fall of Toledo and forces the Castilians to consolidate their northern territories instead of pushing further south.

Valdemar I killed his rival King Sweyn III at the Battle of Grathe Heath, ending a decade of civil war that had fractured Denmark into warring thirds. The decisive victory reunified the Danish crown and launched Valdemar's reign, during which he rebuilt royal authority and expanded Danish territory across the Baltic.

Scotland and France signed a treaty in Paris pledging mutual defense against England. If England attacked one, the other would invade. The Auld Alliance lasted 265 years through dozens of wars. Scottish soldiers fought at Joan of Arc's side. French troops landed in Scotland repeatedly. The alliance ended only when Scotland and England unified their crowns in 1603.

Irish Catholic gentry from Ulster stormed Dublin Castle on October 23, 1641, aiming to force English concessions by seizing the seat of their rule. This failed uprising ignited a brutal decade-long war that devastated the Irish population and cemented English Protestant dominance across the island for centuries.