A Leopard 2 tank on a training exercise in Germany. Nato tanks could play a major role in Ukraine's expected offensive against a weakened Russian force, a western official has said. AP
A Leopard 2 tank on a training exercise in Germany. Nato tanks could play a major role in Ukraine's expected offensive against a weakened Russian force, a western official has said. AP

'Decimated' Russian troops dig in to defend 1,200km front line from counterattack