He previously hired American consultants to develop and implement Western-style financial and administrative systems. Among them was U.S. economist Arthur Millspaugh, who acted as the nation's finance minister. Reza Shah also purchased ships from Italy and hired Italians to teach his troops the intricacies of naval warfare. He also imported hundreds of German technicians and advisors for various projects. Mindful of Persia's long period of subservience to British and Russian authority, Reza Shah was careful to avoid giving any one foreign nation too much control. He also insisted that foreign advisors be employed by the Persian government, so that they would not be answerable to foreign powers. This was based upon his experience with Anglo-Persian, which was owned and operated by the British government.