LINES of dragons’ teeth bollards protect Ukraine from Russian attacks in the “fortress belt” tyrant Vladimir Putin insists must be surrendered before any ceasefire can be agreed.

The Sun on Sunday’s Defence Editor Jerome Starkey visited to see the barricades and tank trap trenches that President Volodymyr Zelenksy says would take four years to breach.

The UK’s Defence Intelligence experts predict 1.9million Russian troops would become casualties in the time it would take to overcome the belt — the best defended position in war-ravaged eastern Donbas .

It stretches 30 miles from Slovyansk to Kostyantynivka in Donetsk Oblast [province] of which Russia currently occupies 70 per cent.

The Kremlin took 40 per cent when it launched a war on Ukraine in 2014, and has capture

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