Ousted defence chief Mykhailo Fedorov, whose reforms riled Ukraine's army bosses

• Fedorov was tasked with modernising an army fatigued after more than four years of fighting Russia's full-scale invasion.
• He boosted salaries, announced plans for a partial demobilisation and introduced game-like rewards systems for the units that kill the most Russian soldiers.
• But conflicts with the more traditional guard plagued his tenure, notably Oleksandr Syrsky, commander-in-chief of the armed forces.