 Complete the following phrase:  Since the Austrians had been taught valuable lessons in the Wars for Silesia, Frederician tactics were, as Frederick knew from his informants, a subject of discussion in the Viennese cabinet, where Francis I, Holy Roman Emperor, remarked that Old Fritz preferred a one-winged-attack style of warfare that burdened his troops heavily. Then, in 1760, official documents obtained in the capture of Major-General Gzettritz offered direct insight into Fredericks oblique tactics, meaning that Frederick could henceforth be engaged with a well-informed army capable of countering his tactics. Furthermore, the Prussian forces, being heavily fatigued by the time they reached their target, lacked the ability to repel a well-situated enemy, such as at 