 <unk> served in the Finnish squadrons during the war of 1788 – 1790 . They supported amphibious operations and conducted raids on the Russian archipelago fleet , while at the same time acting as sea @-@ borne flank support for the Swedish army on the Finnish mainland . <unk> fought in the first and second battles of <unk> . During the first battle in 1789 , one hemmema complemented the similar <unk> , and in the second battle in July 1790 , two hemmemas made up the defensive center and provided a considerable percentage of the firepower . 
