The Ukrainian government lost control of the Crimean peninsula in the spring of 2014, following a disputed referendum on seceding from Ukraine and joining the Russian Federation. 
Serikali ya Ukraine imepoteza udhibiti wa peninsula ya Crimea kwenye msimu wa masika ya 2014, kufuatia kura ya maoni iliyoamua kujitenga kwa eneo hilo kutoka Ukraine na kujiunga na Shirikisho la Urusi.