Battle of Hanko June 22nd to December 2nd 1941
Both Finnish and Soviet coastal forces conducted numerous small-scale amphibious operations in the archipelago surrounding the Hanko Peninsula. The first of these clashes took place at the beginning of July 1941; active operations ended the following October. Fighting on these small islands was often fierce and withdrawing from them under fire was extremely hazardous. In general the operations had little effect on the overall battle, as territorial gains remained negligible.
Battle of Bengtskär
After capturing the small island of Morgonlandet in July 1941, Soviet forces launched a small-scale amphibious assault against the Finnish island of Bengtskär, which had a lighthouse and was thus an important observation post. The initial landing, performed in the middle of the night in foggy conditions, was successful, as Finnish sentries believed the approaching boats to be German minesweepers; however, the small garrison recovered quickly. Putting up fierce resistance, the Finns managed to retain control of the lighthouse while summoning help from nearby naval forces and coastal artillery. The fighting continued throughout the night. In the morning Finnish reinforcements were able to force the remaining Soviet raiders to surrender and drive their naval support away.
The evacuation of Hanko was performed in several convoys, between October 16 and December 2, 1941, which managed to transport roughly 23,000 troops to Leningrad. The fleet suffered casualties from Finnish minefields and coastal artillery, losing 3 destroyers and 2 large transports (Andrei Zhdanov and Josif Stalin) as well as several smaller vessels. Finnish troops entering the area found it heavily mined.
Source: Wikipedia (edited by Jan Fast)
Finnish (left) and Russian (right) commemorative war medals. Photo E-bay.