Valerii Zaluzhnyi, Ukraine's ambassador to the UK and former commander-in-chief of the Armed Forces, says the next five years could be decisive for Ukraine.

Valerii Zaluzhnyi, Ukraine's ambassador to the UK and former commander-in-chief of the Armed Forces, says the next five years could be decisive for Ukraine. He argues that external assurances and guarantees cannot replace Ukraine's own ability to defend itself. The task now, he writes, is to turn wartime experience into future doctrine, technology into an economy, the army into a system of deterrence and independence into an irreversible historical reality.