DAHLBERG (DAHLBERGH), ERIK JOHANSEN, COUNT (1625- 1703), Swedish soldier and engineer, was born at Stockholm. His early studies took the direction of the science of fortification, and as an engineer officer he saw service in the latter years of the Thirty Years' War, and in Poland. As adjutant-general and engineer adviser to Charles X. (Gustavus), he had a great share in the famous crossing of the frozen Belts, and at the sieges of Copenhagen and Kronborg he directed the engineers. In spite of these distinguished services, Dahlberg remained an obscure lieutenant-colonel for many years. His patriotism, however, proved superior to the tempting offers Charles II. of England made to induce him to enter the British service, though, in that age of professional soldiering, there was nothing in the offer that a man of honour could not accept. At last his talents were recognized, and in 1676 he became director-general of fortifications. In the wars of the next twenty-five years Dahlberg again rendered distinguished service, alike in attack (as at Helsingborg in 1677, and Dunamiinde in 1700) and defence (as in the two sieges of Riga in 1 700) : and his work in repairing the fortresses of his own country, not less important, earned for him the title of the " Vauban of Sweden." He was also the founder of the Swedish engineer corps. He retired as field-marshal in 1702, and died the following year.
Erik Dahlberg was responsible for the fine collection of drawings called Suecia anliqua et hodierna (Stockholm, 1660- 1716; 2nd edition, 1856; 3rd edition, 1864-1865), and assisted Pufendorf in his Histoire de Charles X Gustave. He wrote a memoir of his life (to be found in Svenska Bibliotek, 1757) and an account of the campaigns of Charles X. (ed. Lundblad, Stockholm, 1823).
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)