The army required larger and larger bribes to remain loyal. Septimius Severus raised the pay of legionaries, and gave substantial "donativum" to the troops. The large and ongoing increase in military expenditure caused problems for all of his successors. His son Caracalla raised the annual pay and lavished many benefits on the army in accordance with the advice of his father to keep their loyalty, and considered dividing the Empire into eastern and western sectors with his brother Geta to reduce the conflict in their co-rule. But with the major influence of their mother, Julia Domna, this division of the empire was not possible.