He served with distinction as a soldier under Emperors Aurelian and Probus, and in 293 at the establishment of the Tetrarchy, was designated Caesar along with Constantius Chlorus, receiving in marriage Diocletian's daughter Galeria Valeria.
Galerius was promoted to Augustus in 305, and laboured for the rest of his rule to become the sole emperor. In vain, of course.
He died in late April or early May 311 from a horribly gruesome disease described by Eusebius and Lactantius, possibly some form of bowel cancer, gangrene or Fournier gangrene.


Reverse: GENIO AVGVSTI, Genius waring modius standing left holding patera from which liquid flows and cornucopiae
Die Orientation: 0 H
Weight: 5 g

Reverse: SACRA MONET AVGG ET CAESS NOSTR, Moneta standing left, holding scales and cornucopiae. Star in left field, B in right field.
Die Orientation: 0 H
Weight: 0 g

Reverse: Genius standing l., holding patera and cornucopia; TSA.
Die Orientation: 6 H
Weight: 9.47 g

Reverse: Genius standing left, pouring out patera and holding cornucopia; GENIO IMP_E_RATORIS / ·HTA·
Die Orientation: -
Weight: 8.43 g

Reverse: Genius standing left, wearing chalmys, holding cornucopia, pouring libations from patera; GENIO A_VGVSTI/ crescent _A / SIS
Die Orientation: -
Weight: 5.9 g

Reverse: Legend within wreath; VOT / X / F K
Die Orientation: -
Weight: 3.1 g
.jpg)
Reverse: Genius standing left, wearing modius and chalmys, pouring libations from patera, holding cornucopia; GENIO POPV_LI ROMANI / Γ / ANT
Die Orientation: -
Weight: 9.9 g

Reverse: legend within wreath; VOT / . / X / T
Die Orientation: -
Weight: 3.8 g

Reverse: Genius standing left, wearing modius and chalmys, pouring libations from patera, holding cornucopia; GENIO POPV_LI ROMANI • / Z / ANT
Die Orientation: -
Weight: 8.7 g
.jpg)
Reverse: GENIO POPVLI ROMANI, Genius standing facing left, modius on head, nude except for chlamys on left shoulder (falls low); holding cornucopia in left hand and pouring libation from patera in right; K in left field; Epsilon over V in right field; ANT in exer
Die Orientation: 5 H
Weight: 8.97 g
.jpg)
Reverse: GENIO POPVLI ROMANI CMH (in ligature), Genius, wearing modius, nude, chlamys draped over left shoulder, standing facing left, pouring liquid from patera in right hand and holding cornucopia in left; SMNB in exergue
Die Orientation: 12 H
Weight: 6.68 g
.jpg)
Reverse: GENIO POPV-LI ROMANI, Genius standing left, holding patera and cornucopiae
Die Orientation: 5 H
Weight: 9.57 g