President Putin is tightening his grip on Ukrainian territory, which Russia partially controls, as Ukraine continues to take back more ground on the battlefield.Despite pressure growing on the Russian leader, he is showing no signs of de-escalation as he has announced that martial law will be enforced in the four areas of Ukraine occupied by Russia, which Moscow claims it has annexed.Meanwhile, a village in recently liberated eastern Ukraine is now on the front line. Fighting, on the front line near the city of Lyman in eastern Ukraine, involves not only artillery strikes but also close-quarters combat, as the BBC’s Jonathan Beale finds out.