What happened 305 AD

On 1 May 305, Diocletian called an assembly of his generals, traditional companion troops, and representatives from distant legions. They met at the same hill, 5 kilometers (3.1 mi) out of Nicomedia, where Diocletian had been proclaimed emperor. In front of a statue of Jupiter, his patron deity, Diocletian addressed the crowd. With tears in his eyes, he told them of his weakness, his need for rest, and his will to resign. He declared that he needed to pass the duty of empire on to someone stronger. He thus became the first Roman emperor to voluntarily abdicate his title.

Constantius succeeded Maximian as Augustus of the West, but Constantine and Maxentius were entirely ignored in the transition of power. This did not bode well for the future security of the tetrarchic system.

Diocletian retired to his homeland, Dalmatia. He moved into the expansive Diocletian's Palace, a heavily fortified compound located by the small town of Spalatum on the shores of the Adriatic Sea, and near the large provincial administrative center of Salona. The palace is preserved in great part to this day and forms the historic core of Split, the second-largest city of modern Croatia.

The Battle of Bovianum was fought in 305 BC between the Romans and the Samnites. The result was a Roman victory and the end of the Second Samnite War.

In 305 BC, Ptolemy took the title of King. As Ptolemy I Soter ("Saviour"), he founded the Ptolemaic dynasty that was to rule Egypt for nearly 300 years.

Zou Yan was born.