into humiliating retreat: and liberate dozens of occupied towns - as NATO 'warns Kremlin will test NUKES on the border to save face' Russia's frontline has collapsed in the south of Ukraine with dozens of towns liberated in a matter of hours Kyiv said its troops are 'confidently advancing to the sea' as city of Davydiv Brid is now under their control Pro-Russian military bloggers said their forces had retreated around 10 miles down the Dnipro River It comes just days after Putin declared the Kherson region - along with three others - to be part of Russia Russia's frontline...