Having signed the Eternal Peace Treaty with Poland in 1686, Russia became a member of the anti-Turkish coalition ("Holy League" — Austria, Venice and Poland), which was pushing the Turks south after their failure at Vienna in 1683 (the major result of this war was the liberation of most of Hungary from Turkish rule). Russia's role in 1687 was to send a force south to Perekop to bottle up the Crimeans inside their peninsula.