It is common wisdom that Russia has exhibited a historic drive for warm water ports. This view is widely held in the English-speaking world and is frequently used whenever tensions are high as an explanation for Russian foreign policy and behavior.
Green, William C.
"The Historic Russian Drive for a Warm Water Port: Anatomy of a Geopolitical Myth,"
Naval War College Review: Vol. 46
, Article 7.
Available at: http://digital-commons.usnwc.edu/nwc-review/vol46/iss2/7