Ancient communications were slow and precarious, so overseas commanders enjoyed/suffered from partial absence of control by home authorities. Isolation should not be overdone. Literary sources mention official letters home only when remarkable for some reason. Requests to the senate for supplies from Rome were made routinely. Equally, some messages and orders arrived from Carthage. ‘Peripheral imperialism’, far-reaching decisions by men on the spot, are a feature of Roman operations in Iberia. Publius Scipio (father)’s decision to fight the war there is a good example. Other examples are reviewed. Hannibal’s treaty with Philip was co-signed by Carthaginian advisers. Appointment of good subordinates is an important indicator of the quality of a commander’s personal initiatives. Italian Locri is taken as a case study because Hannibal and Scipio both made decisions affecting it. Hannibal’s appointee Hamilcar was guilty of long-term arrogance but was perhaps not as bad as Scipio’s scandalous lieutenant Quintus Pleminius.