Complete the following sentence: "The Ruin:" After Khmelnytsky's death in 1657, it proved impossible to maintain a Cossack state. Complete the following sentence: "The Ruin:" After Khmelnytsky's death in 1657, it proved impossible to maintain a Cossack state. area was effectively divided at the Dnieper from 1660. The partition of Andrusovo was done without Cossack consent. See The Ruin (Ukrainian history). During this period, Doroshenko allied with the Turks, bringing Ottoman armies onto the steppe for the second and last time (
1681).