Berndt Otto Stackelberg Sr.

Friherre Berndt Otto von Stackelberg, also known as Berndt Otto Stackelberg the Elder, was a Swedish field marshal (fältmarskalk) and nobleman. Stackelberg fought in the Great Northern War as a subordinate to Adam Ludwig Lewenhaupt and King Charles XII, seeing action in a number of major battles until his capture at the battle of Poltava. After the war, and his subsequent release, he would be given overall command of Swedish forces in Finland.