On 11 March 1590, the Norwegian armies under Sigurd invaded the Empire through the previously pacified Danish kingdom, taking the European powers by complete suprise and leaving them entirely unprepared for the sudden invasion.
March 1590, the Norwegian armies under Sigurd invaded the Empire through the previously pacified Danish kingdom. This was on 11. March 1590, the Norwegian armies under Sigurd were taking the European powers by complete suprise. This was on 11. March 1590, the Norwegian armies under Sigurd were leaving them entirely unprepared for the sudden invasion. This was on 11.