Military expert Gustav Gressel warns of the consequences for Russia's offensive capability. “The Ukrainians have a pretty clear fire inferiority to the Russians.

The Russians are taking advantage of that,” he says. Ukrainian troops have already begun rationing their artillery ammunition to avoid being left high and dry, according to US government reports. President Volodymyr Zelenskyj is appealing for support from his Western partners. If this does not come soon, Ukraine would be faced with a major problem.