The southern city of Kherson, which fell to Russian forces in the first few days of the war, is one of the places Ukraine would need to liberate if Putin’s army is to be repelled. But what realistic chance is there? Many argued that the Russian occupation is a one-way process: that having taken Crimea, Putin would extend his reach northwards and westwards – with the only question being how long Ukraine could hold off an offensive from its far-bigger enemy.