Several floods such as the "Grote Mandrenke" in 1362 and the Burchardi Flood of 1634 damaged great parts of the North Frisian coastal area. In these floods entire islands were destroyed and a great part of North Frisian language was torn apart in linguistical and political terms. Additional hardship was brought about by a number of wars, such as the Thirty Years War that reached North Frisia in 1627, the Second Northern War between Sweden and Denmark 1657–1660, and the Great Northern War from 1700–1721 where Tönning was besieged and partially destroyed in 1713.