A girl lights a candle during Latvian Freedom Fighters’ Remembrance Day, or Lacplesis Day, to commemorate those who fought in the 1919 Latvian War of Independence, near Riga castle on November 11th. In Latvia, Russia’s increased military activity is seen as an echo of the cold war. Photograph: Ints Kalnins/Reuters

In the cold, slate-grey skies and seas of northeast Europe, an old game is being played out under new rules.Where for decades the Soviet Union probed (...)