Dr Lars Ericson Wolke is professor of history at the Swedish Defence University, Stockholm and docent in military history at Åbo Akademi University, Turku, Finland. He is also a member of the Royal Swedish Academy of Military Sciences, sat on the board of the International Commission of Military History 2005-2015 and was senior archivist at the Military Archives, Stockholm. He has written over thirty-five books and is a leading expert on the military history of Sweden, in particular on the Thirty Years War and the Great Northern War.