Carl Baltzar von Dahlheim (1669–1756) was a German-Swedish military fortification officer, born in Saxony,[1] who distinguished himself serving Sweden during the Great Northern War.
After a short education, Dahlheim became a mercenary already as a teenager, participated in the battle of Vienna in 1683, and later in the English Glorious Revolution of 1688 under William III of Orange.
At the time of the outbreak of the Great Northern War, Dahlheim joined a Swedish regiment and distinguished himself as military engineer during Charles XII's campaign in Poland after the battle of Narva.
In 1718 he was released and appointed quartermaster general in Charles XII's army of Bohuslän in preparation of the king's second campaign against Norway.
In 1719 Dahlheim made his most renowned military achievement, as organizer and leader of the defence of Baggensstäket against the invading Russian skärgårdsflottan.