The article focuses on the case of Ukraine, particularly referring to the time, when Ukraine lost its energy infrastructure in March 2014, three weeks after the start of the Russian invasion into Crimea. The Naval Forces of Ukraine were blocked in the bays of Sevastopol and Donuzlav. Drilling and gas extractive platforms were captured by the Russian paratroopers, who landed on the platforms. The loss of 1.6 bcm of gas from the national production of total 21.5 bcm was not very sensitive for Ukraine, as that gas was supplied for the peninsula only. However, Ukraine lost almost all marine gas production infrastructures, which had been developed in Ukraine since the 80th. It was the first but last success of the Russian forces in capturing the energy infrastructure.