Kursk.

Commentators have not remarked on the symbolism of the Ukrainian incursion into Kursk Oblast (Province). 
The Battle of Kursk in summer 1943 was one of the turning-points of the Second World War, and the biggest single battle ever fought.

A huge, nuclear-powered submarine named after the battle and the Oblast got into difficulties in the Barents Sea and sank with its crew of 118 in the year 2000. 
Putin was criticised for a failure in leadership in dealing with the emergency.  In the end, divers from Norway and Britain were brought in to access the submarine, but found no survivors.

The capture of territory in Kursk Oblast thus strikes a chill to the hearts of Russians, especially Vladimir Vladimirovich Putin. 

MEANWHILE, IN ANOTHER PART OF THE WOOD,

The Russian anti-war activist and gifted classical pianist Pavel Kushnir died in prison after a hunger strike which was his final protest against the invasion of Ukraine.

He was seized and put in prison for releasing four anti-war videos on YouTube.

He had four followers.