One of the deadliest naval battle in the history is seldom told to the rest of the world. Around 12000-25000, Estonian and Latvian citizens were lost. Additionally numerous Russian war ships were sunk. The aim was to evacuate people and move naval arms to protect Leningrad. A big tragedy. Why they had to start this evacuation through minefield. They should have left civils to Tallinn.

https://en.m.wikipedia.org/wiki/Sovi...ion_of_Tallinn