Valery, the game never allowed to replay the battle. Only the battle replay plugin allow to press Cancel button in battle results screen and start the same battle again. Anyway, the plugin cannot restore everything, the scripts could change (specially, global variables). Thus it generates two ERM events, allowing to reset data manually. In other words, plugin should not be used with complex scripts without scripts adaptation and testing. Battle Save plugin is better for this task, though it allows to pick guarded resources and artifacts.