Old clock in sand with the words: It Happend in March

Browse Historical Events by Month: What Happened in March?

Explore key moments from March in U.S. and world history — organized by year. Dates for earlier events may be approximate.

Note: Sources for the historical content shown, include research and reviews of relevant Online History Resources or printed material. When possible, we show a link to a source which provides additional or unique perspective about the event.

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69 CE, March 15

Roman Emperor Galba is assassinated by the Praetorian Guard, leading to the Year of the Four Emperors.

81 CE, March 13

Roman Emperor Titus, famous for completing the Colosseum, dies.

98 CE, March 18

Trajan becomes Roman Emperor after the death of Nerva, starting the golden age of the Roman Empire.

117 CE, March 25

Roman Emperor Trajan dies, and Hadrian becomes Emperor.

180 CE, March 17

Commodus, Roman Emperor, makes his son Commodus co-emperor.

193 CE, March 28

Pertinax, Roman Emperor, is assassinated by the Praetorian Guard, leading to the Year of the Five Emperors.

222 CE, March 11

Roman Emperor Elagabalus is assassinated, and Alexander Severus becomes emperor.

268 CE, March 20

Pope Dionysius declares March 25 as the official date of celebrating the birth of Jesus Christ (Christmas).

303 CE, March 7

Roman Emperor Diocletian orders the persecution of Christians.

313 CE, March 1

Roman Emperors Constantine the Great and Licinius issue the Edict of Milan, granting religious tolerance in the Roman Empire.

363 CE, March 5

Roman Emperor Julian orders the rebuilding of the Jewish Temple in Jerusalem.

410 CE, March 18

The Visigoths, led by Alaric, plunder Rome, marking the first time the city falls to invaders in over 800 years.

451 CE, March 20

The Council of Chalcedon declares Jesus Christ to have two natures—fully divine and fully human.

476 CE, March 23

Romulus Augustulus, the last Roman Emperor, is deposed by Odoacer, marking the fall of the Western Roman Empire.

536 CE, March 24

A mysterious atmospheric event causes a dense fog over Europe and the Middle East, believed to have been caused by a volcanic eruption.

589 CE, March 7

Reccared I, Visigothic King of Hispania, converts to Catholicism from Arianism, leading to the conversion of the Visigothic nobility.

632 CE, March 8

The Islamic prophet Muhammad’s last sermon is delivered during his Farewell Pilgrimage in Mecca.

711 CE, March 26

Tariq ibn Ziyad, a Muslim commander, crosses the Strait of Gibraltar, beginning the Muslim conquest of Hispania.

732 CE, March 3

Battle of Poitiers: Frankish leader Charles Martel defeats the Islamic Umayyad Caliphate, halting the Muslim advance into Western Europe.

843 CE, March 14

The Treaty of Verdun divides the Carolingian Empire among three grandsons of Charlemagne, marking the foundation of France, Germany, and the Middle Kingdom (Lotharingia).

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