Kharkiv Pact

The Kharkiv Pact is a 2010 agreement between Ukraine and Russia that granted Russia the right to maintain its Black Sea Fleet in Crimea for 25 years, until 2037, in exchange for a discount on Russian gas supplies to Ukraine. This agreement was a significant concession by Ukraine, allowing Russia to maintain a military presence in Crimea. The pact was signed by Ukrainian President Viktor Yanukovych and Russian President Dmitry Medvedev.