 The professional soldiers were stationed at the outer field works, Kastellet (the Citadel) and Slotsholmen (the Castle Islet).The Swedish army consisted of about 9,000 professional soldiers, while the Danish defenders, a mixture of professionals, militia and raw civilians, were of an equal number.The Swedes started the action by making a diversionary attack at Christianshavn and Slotsholmen at the evening on 9 February.