Original: On the death of Galerius, in May 311, Licinius shared the eastern empire with Maximinus Daia, the Hellespont and the Bosporus being the dividing line.
Simplified: On the death of Galerius, in May 311, Licinius shared the entire empire with Maximinus Daia. The Hellespont and the Bosporus were the dividing line.