Charles XIII of Sweden
As Russian forces embarked upon their unprecedented march across the frozen gulf, King Gustav IV — accused of fatal mistakes leading to the loss of Finland — was dethroned in Stockholm on 13 March, and his uncle was proclaimed Charles XIII of Sweden. Four days later, Bagration's corps of 17,000 men occupied the strategic Åland Islands, while Kulnev led a vanguard further across the frozen sea that on 19 March reached the Swedish shore within 70 km from Stockholm.