Isthmus of Perekop
In December 1855, Tsar Nicholas I wrote to Prince Alexander Menshikov, the Russian Commander-in-chief for the Crimean War, demanding that the reinforcements being sent to Crimea be put to a useful purpose and expressing a fear that enemy landings at Eupatoria were a danger. The Tsar feared rightfully so that additional Allied forces at Eupatoria, located 75 kilometers north of Sebastopol, could sever Crimea from Russia at the Isthmus of Perekop cutting-off the flow of communications, materials, and reinforcements.