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 Frederick's 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 Kunersdorf, or an enemy that made a sudden about-turn, such as at the Battle of Zorndorf or the Battle of Torgau.