With so many emperors now in existence, in 308 Galerius, together with the retired emperor Diocletian and the now active Maximian, called an imperial 'conference' at Carnuntum on the River Danube to rectify the situation and bring some order back into the imperial government [REF].
The last years of Galerius saw him relinquishing his aspirations towards being the supreme emperor of the empire, though he managed to retain the position of first among equals.