Prior to the 2014 Crimean crisis, Ukraine maintained a very modest naval force for a nation that lacked shores with any of the world's oceans. The majority of the bases of the Ukrainian Navy, along with 12,000 of Ukraine's 15,450 Navy personnel were stationed in Crimea. On 24 March 2014, at least 12 of Ukraine's 17 ships in Sevastopol were seized by Russia, while the ensuring conflict saw 2 Ukrainian navy officers killed by Russian marines. Ukraine also lost control of its Navy's main underground ammunition-storage site at the Inkerman valley, outside Sevastopol, as well as of its helicopter-repair facilities. The Navy's 750-strong 1st Naval Infantry Battalion at Feodosia was arrested and its equipment seized. The Ukrainian Navy also lost all its missile boats. In addition, 51 mainly auxiliaries ships were lost, though most were eventually returned to Ukraine after a brief internment.