Trembling and terrified out of his wits, Alexander just managed to get back to his tent. There, the reports say, he waited for his executioner, clinging to his mother and weeping and blaming her for his misfortunes. After Maximinus had been hailed with the title of Augustus by the whole army, he sent a tribune with some centurions to kill Alexander and his mother and any of his entourage that showed resistance. On arrival they burst into the tent and slaughtered the emperor, his mother and all those thought to be his friends or favourites.
Herodian. History of the Empire, Volume I: Books 1-4. Translated by C. R. Whittaker. Loeb Classical Library 454. Cambridge, MA: Harvard University Press, 1969.
Herodian. History of the Empire, Volume II: Books 5-8. Translated by C. R. Whittaker. Loeb Classical Library 455. Cambridge, MA: Harvard University Press, 1970.
Remark :
thirdperson: The soldiers of Severus Alexander had either switched sides to Maximinus Thrax or did not intervene.