To understand how old this war really is, one must know the origins of conflict between Christianity and Islam. The Russian Orthodox churches in Eastern Europe are often seen with an Orthodox cross at the top, set into an upturned half moon. This is I believe symbolic of the victory of Christianity over (slavery to) Islamic forces in greater Russia and other slavic nations.
Armenia and Georgia asked Empress Catherine the Great to send troops to their protection from the Islamic Chechens who were raiding their villiages and causing great havoc - plus selling their children to the Turks.
An old battle indeed! One should read "Land Of The Firebird" by Suzanne Massie; re: Old Russia.