Editing Macrinus (section)

=== Execution ===
Macrinus realised that his life was in danger but struggled to decide upon a course of action and remained at Antioch.{{sfn|Gibbon|1776|p=169}} He sent a force of cavalry commanded by [[Ulpius Julianus]] to regain control of the rebels, but they failed and Ulpius died in the attempt. This failure further strengthened Elagabalus' army.{{sfn|Gibbon|1776|p=169}}{{sfn|Mennen|2011|p=15}} Soon after, a force under Elagabalus' tutor Gannys marched on Antioch and engaged Macrinus' army on 8 June 218 near the village of Immae, located approximately {{convert|24|mi|km}} from Antioch.{{sfn|Glanville|1961|pp=248–250}} At some point during the ensuing [[Battle of Antioch (218)|Battle of Antioch]], Macrinus deserted the field and returned to Antioch.{{sfn|Glanville|1961|pp=248–250}} He was then forced to flee from Antioch as fighting erupted in the city as well.{{sfn|Glanville|1961|pp=248–250}} Elagabalus himself subsequently entered Antioch as the new ruler of the Roman Empire.{{sfn|Icks|2011|p=14}} Macrinus fled for Rome; he travelled as far as [[Chalcedon]] before being recognized and captured.{{sfn|Crevier|1814|p=236–237}} His son and co-emperor Diadumenianus, sent to the care of Artabanus IV of Parthia, was himself captured in transit at [[Zeugma (Commagene)|Zeugma]] and killed in June 218.{{sfn|Dunstan|2011|p=407}}{{sfn|Vagi|2000|pp=289–290}}{{sfn|Crevier|1814|p=236–237}} Diadumenianus' reign as emperor lasted less than one month, and he was about 10 years old when he died.{{sfn|Vagi|2000|pp=289–290}} Macrinus, upon learning of his son's death, tried to escape captivity, but he injured himself in the unsuccessful attempt{{sfn|Crevier|1814|p=236–237}} and was afterward executed in [[Cappadocia]]; his head was sent to Elagabalus.{{sfn|Crevier|1814|p=236–237}} Much like Macrinus, Diadumenianus' head was also cut off and sent to Elagabalus as a trophy.{{sfn|Bunson|2014|p=173}}