The Attack of the Dead Men

The Orthodox Church has long learned to resurrect the dead. This fact convinced the people in the Russian Empire that Orthodoxy was the true faith.
When a person is resurrected for the first time, he does not lose his personality. But with each new return to the world of the living, a person loses his mind and appearance. There is a strict rule that states that you cannot resurrect more than seven times, because on the eighth the returned becomes aggressive and uncontrollable.
The Rite of Resurrection is always used on the battlefield, as it is a near-infinite resource of military force. Squads of returned soldiers are always marching into battle on the front lines.