At two o'clock a.m. on July 4,1790, Swedish units bombarded Russian shore batteries and Swedish sloops, led by Lieutenant Colonel Jacob Tönningen, attacked a Russian naval unit just west of Vasikansaari Island, west of Björkö sound.
Swedish units bombarded Russian shore batteries. This was at two o'clock a.m. on July 4,1790. Swedish sloops attacked a Russian naval unit just west of Vasikansaari Island, west of Björkö sound. This was at two o'clock a.m. on July 4,1790. Swedish sloops were led by Lieutenant Colonel Jacob Tönningen.