Battle of Actium “all over print T-shirt”

The Battle of Actium (2 September 31 BCE, fought in the Ionian Sea off Actium, Greece) was the decisive engagement of the civil war fought between Octavian Caesar(l. 63-14 CE, later known as Augustus, r. 27 BCE - 14 CE) and the forces of Mark Antony (l. 83-30 BCE) and Cleopatra VII of Egypt (l. c. 69-30 BCE). The battle was the culmination of over ten years of rivalry between Octavian and Antony following the assassination of Julius Caesar in 44 BCE and the resultant alliance of Octavian, Antony, and Marcus Aemilius Lepidus (l. 89-12 BCE) known as the Second Triumvirate (43-36 BCE) formed to pursue and defeat Caesar's assassins, which they did at the Battle of Philippi (42 BCE).

After Philippi, the Second Triumvirate ruled different regions of the Roman Republic but mutual suspicion and resentment between the three men resulted in its fracture in 36 BCE, when Lepidus was exiled by Octavian, and end in 33 BCE when Antony refused to participate. The Battle of Actium was the conclusion to an enmity between Octavian and Antony which began shortly after the formation of the Second Triumvirate. Having lost the battle, Antony and Cleopatra killed themselves the following year and Octavian became the first Roman emperor in 27 BCE.

source 

World history .org