How many Roman military dates do you know?

[Dan Diffendale]

Going through Wikipedia...

Jan 2, 366 - Alamanni cross the frozen Rhine in large numbers
Jan 10, 49 BC - Caesar crosses the Rubicon
Jan 15, 69 - Otho seizes power in Rome
Jan 16, 27 BC - Octavian given the title Augustus by the Senate.
Jan 24, 41 - Caligula assassinated by Praetorian Guard
Jan 27, 98 - Trajan becomes emperor

Feb 15, 399 BC - Philosopher and war veteran Socrates sentenced to death
Feb 17, 197 - Battle of Lugdunum: Septimius Severus defeats Clodius Albinus

September 2, 31 BC - Battle of Actium
Sept. 4, 476 - Romulus Augustus deposed by Odoacer
Sept. 6, 394 - Battle of Frigidus, Theodosius defeats Eugenius and Arbogast
Sept. 12/23, 490 BC - Battle of Marathon ??
Sept. 13, 533 - Battle of Ad Decimium, Belisarius defeats Gelimer and Vandals
Sept. 18, 323 - Battle of Chrysopolis, Constantine defeats Licinius
Sept. 22, 66 - Nero creates Legio I Italica
Sept. 27, 489 - Battle of Verona, Theodoric defeats Odoacer
Sept. 28 or 29, 48 BC - Pompeius Magnus assassinated by Ptolemy XIII
Sept. 29, 61 BC - Pompeius celebrates third triumph on his birthday.

more later as I have time...